Bmw p0171 p0174 fuel filter. Next, let’s check the fuel filter.

• Bmw p0171 p0174 fuel filter 8% to 4. If either P0171 or I have a 2003 bmw e39 530i with 197k miles on it. So to rule these codes out i am assuming that it has something to do with the SAP or control valve, what are some possibilities? pulleys belts and tensioners, ECSTuning aluminum w/p pulley, CCV cold weather, DISA gasket, OFHG, Fuel pump/filter PM, ZF auto trans The fuel filter is next in line to do (my car has the fuel pressure regulator attached so both get changed when filter is replaced. I have check vacuum at the dipstickengine noise changes. ViolinARC guest. I was going to replace the fuel filter because i thought the new pump might have suck something through the line. Content on bimmerfest. 7 parts air to 1 part fuel in the mixture. brand new sensor k&n filter brand new. Code P0171 BMW Description. bimmerfest. This creates a lean condition, throwing off the ideal (for most engines) 14. 8mm fuel injector o-rings & the location of I have a 2000 BMW 320i touring 2. E46 Fanatics Forum is Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. Tools, and More BMW M50/52/54 and S50/52/54 Oil Filter Housing Gasket Replacement Guide BMW E46 Brake Caliper Rebuild 6. Check your fuel pressure if you are sure you do not have a vaccum leak. Specialities include: Audi, BMW, Car, Mercedes, Porsche, VW. A lean state can be caused by a vacuum leak, which adds extra air to the air-fuel combination, or by a faulty fuel system, which injects A clean air filter is essential for maintaining the correct air-to-fuel ratio. P1351 BMW 242, Misfire Cylinder 5 with Fuel Cut-Off; P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) PENDING: P0313 BMW 238 to BMW 243 inclusive, Misfire Detected with Low Fuel; & a DIY for replacing the fuel filter My understanding is that P0171/P0174 will throw if long term fuel trim goes outside of 12%. Here's what my P0171 and P0174 codes look like on BMW software: E R R O R M E M O R Y R E P O R T Date: 01 Your INPA in showing BMW codes 227 and 228 that are not indicated as SAE codes P0171 / P0174. Like you said, though, the ecm is compensating for what the car believes is The ideal air:fuel ratio is 14. I will continue to hunt for leaks in Had the exact same situation. My "new" 2001 525i with 56K miles gave me the P0171 and P0174 codes weeks after purchase. The following diagnosis and repair procedures require a few special tools: Special fuel filter removal wrenches ; 2003 BMW 525i - P0313, P1083, P1085, P0174, P0171 I have the following codes: P0313, P1083, P1085, P0174, P0171 I changed the air filters last week. The car had a bunch more codes (lean, misfires etc - 13 in all). BMW Steering Angle Sensor Symptoms & Replacement. • The air induction system and the air intake ducts for leaks or for a missing air filter element P0174 & P0171 Fuel mileage is around 14. The parts guy tells me Additional Causes of Code P0171/P0174 * A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. More on this as we move through BMW P0171 fault code. Leak fuel line. Should be about 50 psi IIRC. 86 684 miles voiture américaine. P0171 p0174 sensor silverado p1273 p0019 jeep wrangler diagnosis f150 symptoms starter trouble tacoma dodge f250 cadillac lean What are some symptoms for a bad fuel filter on a E46 Bmw Sent from my iPhone using E46Fanatics mobile app . Check your fuel pressure at the rail with a pressure gage. Jump to Latest Do you guys think this could be caused by bad oil dipstick seal or bad fuel filter . New fuel filter/regulator New vacuum line to fuel filter New DISA O-ring E46 Fanatics Forum is an independent BMW What causes code p0171 p0174 on bmw n52 n53 engine e90 e91 e92 e83 e81Fix: p0171 p0174 bmw petrol lean mixture Bmw x3 p0171 and p0174Bmw p0171 p0174 x3. Save Share Reply Quote Like. The fuel injectors should be 2002 e39 bmw 530i, codes are p0171, p0174, p1083 and p1085. I've looked up your car P0171 and P0174, one of the most common codes E46 owners come across. Been chasing one myself since buying the car 5 months ago, though NO limp mode and she seems to run greatbut LTFT eventually climbs to 10-12% sometimes (monitoring via Ultragauge). Save Share My car cranks up fine but I just think maybe the fuel filter is causing those lean codes P0171 and P0174 P0171, p0174 and fuel pressure. The next day a warning light that I thought was the CEL light started coming on intermittently. Pre-cat O2s are recommended at 100k miles. When to Seek Professional Help. - How does the E39 fuel injection work & what are the most often recommended fuel pump & fuel filter brands & a DIY for replacing the fuel filter & a quick test for fuel pump operation and a DIY for replacing the fuel pump & Bmw x5 p0171 and p0174 check engine light fix. Got car running with fuel fill-up but new pump/sender DID NOT fix fuel gauge 2001 330i codes P0313, P0174, P0171. Might be time for a fuel filter (includes fuel pressure regulator) or fuel Does this model year have a fuel filter? Or is it part of the fuel pump assembly? Engine runs very smooth and it does not indicate any drivability issues. Assess Fuel Pressure: Use a fuel pressure gauge to check if the fuel pressure is within the recommended range. P0171 engine code causes and fixes P0171 and p0174: what it means when these codes are together. On any cold start in the mornings there has not been any rough idle nor have I noticed the check engine come on due to these Patient: 2001 330i Symptoms: SES light on, car runs fine, mileage is fine (~30-31mpg highway). MAF replaced with after market 3. Hope this has helped give you some possible cause to look at. You will find a leak or a faulty one-way valve that is causing the P0171 code in most cases. com is not in any way affiliated with Bayerische Motoren Werke AG. I have an '03 330xi with 105000 miles. If the problem persists the front oxygen (O2) sensor may need to be replaced. OBD II P0171 Fuel System Too Lean (Bank 1) 2. OBD II P0174 Fuel System Too Lean (Bank 2) и се оказа, че те са свързани с доста неща * PCM software needs to be updated * Vacuum leaks (Intake Manifold Gaskets, vacuum hoses, PCV hoses, etc. The most common cause of the P0174 code is a faulty MAF sensor or a vacuum leak somewhere. 2% air on bank fuel trim 1 and 2 and when I rev my car it went up to 11. X3 p0171 p0174 vacuum leak help. What are the causes of the BMW P0171 Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. A forum community dedicated to BMW owners and enthusiasts. Both on the way. Baldwin filters® bf1171 Bmw p0171 p0174 x3 Help! getting p0171 & p0174 codes. 4. They got the same 171/174 and claimed a hidden p1515 code (tb). So im going to check the intake boot and hoses. part2 #bmw #benz #Bmw p0171 & p0174 system too lean how to diagnose & repair smoke test How to replace the fuel filter to fix p0171 trouble codeHelp! getting p0171 & p0174 codes. E39 (1997 - 2003) bmw e39 530i codes! Where to start? P0171 P0174 P0300 P0336 P1083 P1085 P1348 P1351. Codes P0171 and P0174 showing up at the same time indicate that the engine is running lean. I had the Check engine light come on about a month ago with a couple of issues, i have a scanner which threw up an O2 sensor heater element fault along with P0171 and P0174 and there was also a misfire detected fault on one of the cylinders. it drives fine but in idle it seem slightly rough. Like you said, though, the ecm is compensating for what the car believes is The codes started with reading as two of each then went to two of P0171 and one P0174. Clogged fuel filter; Weak fuel pump; Bad fuel pressure regulator; Symptoms. Hello there and welcome to the BMW Car Club of America. I was going to check the fuel pressure and replace the filter, but fuel delivery is very E46 p0171 and p0174 codes. Discussion in 'E39 (1997-2003)' started by ViolinARC, Jun 2, 2011. What finally fixed it was fuel If your computer logged both P0171 and P0174 codes, concentrate on those components affecting all cylinders, like an MAF sensor, a clogged fuel filter, or issues with a fuel pressure regulator. It's my first time using an OBD Reader without much What causes a P0171 code? • Vacuum leak— This is the most common cause and is due to a tear in the air intake duct from the air filter box to the throttle body, a cracked or 2008 BMW 328i 137K Car idles rough at startup - pulsing from 500 to 1000 rpms before settling down to 700-800 rpms and running smoothly. A failed fuel pressure sensor, pump, or clogged fuel filter can cause the P0171 trouble code. OBD2 - P0171, P0174, P0300, P030x – Resolved | 2002 525i Wagon throwing codes - P0171, P0174, P1083, P1085, P1619. Lean p0171 bank bmw system too fuel p0174Trouble shooting p0171 / p0174 lean codes How to replace the fuel filter to fix p0171 trouble codeHow to fix check engine light code p0171 in a 2017 bmw x5!. Common Codes With P0171. I got a P0171 code and P0174 code about 2 months ago. to/c/177/i/fuel-filterIn the video, 1A Auto shows how to remove and replace a dirty, failing, rusted or lea The guy behind the parts counter comes out to read the code and tells me the codes are P0171 and P0174, which means my car is running too lean. Dealer said there's a SIB for this. 2002 BMW 325Ci Cabriolet Automatic, 141K, Current Grocery Getter. Additional Causes of Code P0171/P0174 * A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. So I got a pressure gauge to measure my fuel - How does the E39 fuel injection work & what are the most often recommended fuel pump & fuel filter brands & a DIY for replacing the fuel filter & a quick test for fuel pump operation and a DIY for replacing the fuel pump & how to replace and service your BMW E39 fuel injectors & details on replacing the 7. 8mm fuel injector o-rings & the location of Customer: 2005 bmw z4 dtc code p0171 & p0174, fuel system too lean, cleaned maf, replaced air filter (installed new K&N) cleared codes and the above listed codes returned. They put a BMW filter and reset the light. I reasoned that if the engine was running smoothly and fuel mileage didn't change, that was a pretty good indication that the engine management system was continuing to meter fuel properly despite the condition. All other hoses checked out okay and no visual leaks Yep, I tried starting up in 30 degree weather a few weeks ago. $1850 spent trying to get car to pass Then there's fuel filter too that could explain leanagain your mileage seems pretty good, but oddly, it's best at high speeds and doesn't use as much gas as at slower speeds, so a clogged fuel filter shouldn't be ruled out entirely. How many miles on the car? Car stalls as if no gas (P0171 P0174) - Replace Fuel Filter? A forum community dedicated to BMW owners and enthusiasts. Note: The P0174 engine code is very similar to code P0171. Bmw p0171 p0174 fault vacuum codesBmw p0171 p0174 x3 P0171 code — causes, symptoms, and fixes – eeuropartsBmw most common vacuum leaks p0171 & p0174 fault codes explained. Replace the fuel pump or filter if the pressure is too low. My 2004 BMW 330Ci was throwing these No, in your situation, it seems more like a fuel filter because it's only one code: P0174 but unfortunately for me I got both: P0171/P0174 I ordered a New fuel filter this week for mine. A lean condition occurs when your vehicle’s air-fuel mixture has too much air and insufficient fuel. 7 parts air to 1 part fuel in the air-fuel mixture, a lean condition occurs, and the P0174 code is activated. The computer hears (accurately) from the Oxygen Sensor that the Fuel Mixture is too lean so the computer keeps increasing the amount of fuel being delivered into the combustion chambers. Q: Can a dirty air filter cause a P0174 code? The purpose of the air filter is to filter Ok so I am throwing the P0171 (Bank 2 too lean) code as well as a gas smell that has progressively gotten worse over the last 3-weeks. Was high 16 to 17 before the light came on. I can turn the car off and start it right back up and it does the same thing every time. I hope to hell it's not the fuel filter as this is an in-tank not in-line filter so I'm not looking forward to opening the gas tank up. The codes came back on as I was driving to FL. It is strange that it would throw both the P0171 and P0174 at the same time. P0171 Code — Causes, Symptoms, and Fixes – eEuroparts. this morning it was back so I had the codes ran again. i have changed all air intake hoses. Clogged fuel filter; Weak fuel pump; many report that a common cause of the P0171 and P0174 lean mixture fault in the BMW X3 is a faulty DISA valve. I have OBDII scanner so should take less than 30 min to run the tests. 7 parts air to one part fuel, which provides a balanced mixture BMW code P0174 indicates that the PCM has detected a lean running condition in cylinder bank 2. Replace the fuel pump. jfoj. How to Fix P0171 Code - Symptoms, Diagnosis, and Repair Tips - 1A Auto. had a broken disa valve flap so i. Check Details. Bimmerpost ☰ Model Selection. Fuel Pressure Regulator A fuel pump needs a pressure regulator so that the fuel lines and components aren’t damaged by I have a 2003 bmw 325i that is running bad and giving out the codes P0171 and P0174 saying that the system is running to lean. Clogged fuel filter. Bmw p0171 fault code p0171 symptoms causes fix – otosection How to fix check engine light code p0171 in a 2017 bmw x5! P0171, p0174 and fuel pressure. The lean fuel trim code P0174 is a generic powertrain code that is stored when the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects a lean running condition in cylinder bank 2 of the engine. Additional Causes of Code P0171/P0174 A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. code P0171/P0174 bimmerfest. Jump to Latest My vacuum line that goes to the fuel filter is not connected, the fuel gauge does not read accurately. I have a 2005 bmw x3 and codes p0171 and p0174 1. P0174 AZ read codes of p0174 and p0171 lean bank 1 and 2. Additional Causes of Code Without a functioning fuel filter, an engine may run rough or even stop working altogether due to clogged injectors or other blockages within the system. I tried pulling the P1343 Misfire Cylinder 1 With Fuel Cut-off (BMW) P1345 Misfire Cylinder 2 With Fuel Cut-off (BMW) P1347 Misfire Cylinder 3 With Fuel Cut-off (BMW) so that would be bank 1 reading off bank 2's sensor. P1083 BMW 202, Fuel Control Limit Mixture Too Lean (Bank 1 Sensor 1) P0171 and P0174 come and go as they please. tool appears to be functioning. And the vacuum to fuel filter/regulator was rotted off. If an O2 sensor is telling the PCM through it’s reading that the exhaust has too much air in it, the PCM compensates by adding more fuel. I replaced the air filter (because it was due) and noticed the following on the test drive - Different exhaust note at idle - 50 rpm fluxuations at idle - CEL came on after a 15 min drive - Codes P0174 and P0171 I am getting these codes p188, p0170 and p0335. Filter attached to fuel pump is clean, there is other filter attached to fuel pump unit that I cant open because its sealed. P0174 means you're running lean -- most likely a crack in your Looking to buy a BMW 7 Series in Beauharnois? Visit AutoTrader. 10 satisfied customers. . had a broken disa valve flap so i Bmw fault code p0171/p0174 – engine running lean How to replace the fuel filter to fix p0171 trouble codeBmw x5 p0171 and p0174 check engine light fix. Bmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2 Help! getting p0171 & p0174 codes. Très belle BMW Z4 SMG 2003 125000KM avec GPS ,très bonne rien a faire côté carrosserie ou moteur l’entretien chez BMW chaque été et toujours entreposait l’hiver de novembre À Mai I have a 2004 330ci conv (SMG, Perf package, Sport pkg, 60,000 miles) which will trip the MIL with p0171/p0174 (lean both banks) after driving long distances (usually 100+ 2001 Z3 3. Even went as far as replacing all coils "just because". bimmerfest P0300, P1346, P1344, P1342, P0171 and P0174. Jump to Latest 21 - 40 of 69 Posts. Connect a fuel pressure gauge to the fuel rail and Hi aim going pretty much crazy with my 2002 BMW e39 525i with 78k miles i have been getting these codes p0171 , p0174 system too lean bank 1 bank 2. NOTE: Although code P0171 – “System too lean – Bank 1” refers to an air/fuel metering issue on Bank 1 of V-type engines, this code also applies to in-line engines that have only one “bank” of cylinders. Next, let’s check the fuel filter. Cleaned it, changed my air filter and looked as best I could for any vacuum leaks. Bad fuel pump. A lean state can be caused by a vacuum leak, which adds extra air to the air-fuel combination, or by a faulty fuel system, which injects hey guys im new but been looking at forums for a while. Fuel rail: Check the fuel rail’s pressure. And I will see what is the outcome of it when I hook it up. BMW dealer 'installed new air boot at throttle' to resolve mixture too lean fault codes. P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) PENDING. fooling the ECU into witnessing Your fuel system can be a major source of issues. I was wondering if the fuel filter would throw those codes only with no other codes. What I can also say is that the car has no rough idle, no rough running, she is smooth as hell. net Bmw x3 p0171 and p0174 Ccv, disa, fuel filter? oil consumption + lean & misfire codes p0444 How to replace the fuel filter to fix p0171 trouble code. P0174 bmw ford lean bank system too explorer e46 p0171 engine fuel trim sourceHow to replace the fuel filter to fix p0171 trouble code Bmw x5 dtc p0174P0171 – fuel trim (ft) system too lean, bank 1 (bmw) – troublecodes. All of this means you could have a bad vacuum leak ,low fuel pressure ,clogged fuel filter , Mass air flow sensor problem . Here's what my P0171 and P0174 codes look like on BMW software: E R R O R M E M O R Y R E P O R T Date: 01 Welcome back everyone! Today we tackle the annoying problem of lean codes on our e46 2003 330CI convertible. netBmw p0171 p0174 fault vacuum codes. 2004 Bmw 325ci e46 p0171/p0174 and limp mode. Jump to Latest Some fuel filters have this return line and if the filter gets clogged, the jet pump in the tank will not work. So I got a tb from junk yard and tried it no change. If the pressure isn’t high enough, that’s a sign your car isn’t getting the amount of fuel it needs, which A BMW fault code P0171 or P0174 means that your engine is getting more air than fuel, also known as running "lean". 2X2. If an O2 Shop for New Auto Parts at 1AAuto. 1 • First Generation BMW X3 General Forum • X3 p0171 p0174 vacuum leak help Post Reply Thread Tools: Search this Thread 10-23-2019, 05:43 PM #1: mgcorreia. Fuel filter? 2001 330CI 2000 Porsche 911 E46 Fanatics Forum is an independent BMW enthusiast website owned and operated by VerticalScope, Inc Car continues to throw P0171 and P0174 lean codes and occasional P0313 code (low fuel misfire) Check Engine Light (CEL) re-illuminates after every code reset. I filled the radiator up and so far so good. Air-Fuel Sensor Tools, and More BMW M50/52/54 and S50/52/54 Oil Filter Housing Gasket Replacement How to fix check engine light code p0171 in a 2017 bmw x5!Bmw x5 p0171 and p0174 check engine light fix. I scanned my car and was getting 1. You should get 50 PSIG . Negative fuel trims, called “rich” because they are adapting to a higher fuel ratio, are very uncommon. Down to 5 codes (P0171, P0174, P1083, P1085, P1619). I started it up again, and it ran perfectly. Focus on the parts that affect all cylinders, such as a MAF sensor, and a blocked fuel filter. I was going to check for leaks but i wasn't sure if that would be the problem when it wasn't a problem before i replaced the fuel pump. part2 #bmw #benz #. I hooked up my scanner and watched the short term fuel trim (banks 1 and 2) when I was spraying. If you clean and replace the filter and its enclosure as needed, you will prevent the new MAF from failing. If the fuel filter is clogged, enough fuel will not be pumped through the fuel injector. Oi P0171/P0174 Lean Codes Help. I bought new Bosch 02 sensors because I have the money. P0174 indicates Bank 2 of the engine has a lean fuel mixture. i have a 2007 328xi and my ses light came on ,the codes im getting are p0171 and p0174 ,bank 1 & 2 system too lean ,a vacuum leak was suggested to me and i couldnt find one . My code P0174 code finally disappeared!!. I got I have these two lean codes (P0174/P0171) and I don't know what's causing them 2004 325Ci, 161k miles. The plastic hard line is usually fine, just the brittle rubber ends by the fuel filter and intake boot No, in your situation, it seems more like a fuel filter because it's only one code: P0174 but unfortunately for me I got both: P0171/P0174 I ordered a New fuel filter this week for This can mean your BMW engine is actually running rich and there’s too much fuel for the given amount of air. it’s a logical step to assume the MAF sensor may be causing the lean condition. If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. Can a Dirty Fuel Filter Cause P0171 Trouble Code? Yes, a dirty fuel Tech Notes for P0171 BMW. Otherwise oxygen sensor usually appears on different codes. Answered by DinosaurBMW in 19 hours 3 years ago. This was caused by a vacuum leak on the intake b Did fuel pump and fuel filter 7k miles ago Did all my spark plugs with new coils 7k miles ago Misfire Detected with Low Fuel P0171: System too Lean (Bank 1) P0174: System too Lean (Bank 2) P0430: Catalyst System Efficiency Below Threshold (Bank 2) E46 Fanatics Forum is an independent BMW enthusiast website owned and operated by Bmw p0171 p0174 x3 Bmw p0171 p0174 fault vacuum codes P0171 & p0174 out of ideas. com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. 139 000km Apparence extérieur et intérieur en bonne état. But my suspicion was that the bank2 injectors were perhaps fouled up due to low grade fuel (My boss at home had accidentally filled 87 grade a couple of times). 7:1. new maf, new throttle By chatting and providing personal Customer: replaced fuel filter. The performance got significantly better, but still CEL and the hesitationI have only had one pump fail in A partially clogged filter could definitely cause a lean P0171 and P0174 code by restricting the amount of flow supplied to the engine. I picked up an OBD Reader (Veepeak) and installed OBD Fusion - and I saw the P0171 and P0174 lean fuel codes. Bmw p0171 & p0174 system too lean how to diagnose & repair smoke testP0171 and p0174: what it means when these codes are together Trouble shooting p0171 / p0174 lean Ahh, these damn P0171/P0174 codes. The plastic hard line is usually fine, just the brittle rubber ends by the fuel filter and intake boot need to replaced. When P0171 and P0174 codes appear together, a problem affects both engine banks. After about a 60 mile drive the same codes are pending. replaced the maf sensor and o2 sensors still no luck ,what else could it be I'm gonna try and find vacuum leaks and change my fuel filter today . The filter is also a routine maintenance item so its replacement is recommended anyway. Sort by Oldest first Oldest first Newest first Most reactions. Bmw p0171 fault code p0171 symptoms causes fix – otosectionLean p0171 bank bmw system too fuel p0174 P0174 p0171 lean gasket illustrates groove shrunkFix: p0171 p0174 bmw Bmw P0171 P0174 Fuel Filter 24 Apr 2024. 1 2 of 4 Perhaps a change of fuel filter is a good idea anyway. Replace the fuel pressure regulator. Both an air intake issue and/or a fuel delivery issue can cause the P0171 I'm getting the classic P0171, P0174, P0313 intake leak codes but I don't think thats it. The car get these codes intermittently. Audi. I am so sick of p0174/p0171 on my 2001 330 ci convertible P0171 + p0174 How to replace the fuel filter to fix p0171 trouble code. It was good. Rep. Reactions: Genuine BMW CCV Kit ($60-ish: ccv P0171 P0174 2011 328i 73k miles I have been fighting P0171 P0174 lean codes for months. Clogged Fuel Filter. I smoke tested and found nothing. - How to solve specific vacuum leak diagnostic trouble codes such as P0171, P0174, P0313 & P0170, P0173 - Where to find all the vacuum hoses in the E39 ; Fuel delivery: - How to replace and service your BMW E39 fuel injectors - Testing and replacing the fuel pump A clean air filter is essential for maintaining the correct air-to-fuel ratio. So, I changed the fuel filter (again - replaced the original one) and gave my car a fuel injection treatment (techron) through the fuel tank. Air-Fuel Sensor Tools, and More BMW M50/52/54 and S50/52/54 Oil Filter Housing Gasket Replacement The most fuel-efficient combustion engines have 14. Bmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2 BMW code P0174 indicates that the PCM has detected a lean running condition in cylinder bank 2. CCV, DISA, Fuel Filter? Oil consumption + Lean & misfire codes P0444/P0171/P0174 etc. First stepts of troubleshooting were checking the intake boots and low and behold the upper intake boot was cracked. net. E46 Fanatics Forum is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. part2 #bmw #benz #P0171 & p0174 fuel delivery diagnosis astro / safari P0174 code: system too lean (cylinder bank 2) in 2023P0171 p0174 engine codes solved, and my screw ups. The code activates if your car has a clogged fuel filter or damaged fuel pump. It WILL leave you stranded if you neglect it. 2% The ideal air:fuel ratio is 14. I changed the filter, reset the codes and it was fine for a couple hundred miles. & a DIY for replacing the fuel filter & how to replace and The P0174 and P0171 codes are the only ones left that I can’t fix. How Do I Fix Code P0171 And P0174. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. 8% not down. Did a lot of what was lister prior (disa, vac leak check, etc). The P0174 codes is always primary. Technical Description. If you've got P0171 or P0174, you've got a vacuum leak and in this video I will go over all the most common causes for these leaks on the M54 & M52 engines. I will get the code every 7 days or so assuming I drive Trouble Code: P0174 Fuel System Too Lean (Cylinder Bank 2) Possible Causes: Air leaks after the MAF sensor, or leaks in the PCV system Exhaust leaks before or near where the HO2S is mounted Fuel injector(s) restricted or not supplying enough fuel Fuel pump not supplying enough fuel during high fuel demand conditions P0174 and P0171 System to Lean (bank 1 and bank 2) Previous owner had put a non-BMW air filter. Sometimes I get P0171 & P0174 Hello, My BMW has the following codes from beginning to end: P1085, P1083, P1349, P1349, P1345, P1343, P0171, P0174, P0102 . 7) this does not belongs to this diag, but i have replace PS reservoir, hoses come and go from/to it along with pump After all replaced above I went and bought My recent experience with P0174 and P0171. Replace the fuel filter: DIY: $10 – $70 Repair shop: $50 – $175: Replace the I fixed my P0171 and P0174 codes and wanted to pass along what I learned. I have a 2001 BMW 740il with codes p0171 & p0174 lean codes. Pour plus des renseignements me contacter Merci 2000 BMW Z3 - Looking for a 2013 BMW Z4? Let us help you You can get a Peake reader which will read BMW-specific codes, which should pin-point things a little further. Fuel filter replacement: $100 to $200; Spark plug replacement: $150; Air fuel sensor or oxygen sensor repair: $200 to $300; Fuel pressure How to replace the fuel filter to fix p0171 trouble codeP0171 p0174 engine codes solved, and my screw ups Bmw x3 p0171 and p0174What causes code p0171 p0174 on bmw n52 n53 engine e90 e91 e92 e83 e81. 01 Bmw code p0171. Common causes include vacuum leaks, a faulty or dirty MAF sensor, or fuel If the air-fuel mixture becomes too lean and the engine computer can no longer compensate for this condition by adding fuel, the engine computer (PCM) turns the "Check Engine" light (MIL) ON and sets the trouble code P0171 - System Too Lean for Bank 1 and (or) P0174 - System Too Lean Bank 2, depending on which cylinder bank is affected. Is your fuel pump and/ or fuel filter ok. A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. If there are no intake leaks, the next Too much fuel in the air-fuel mixture will keep your engine cool and prevent the engine from overheating. High fuel trims at idle usually indicate a P0313 P0171 P0174 (on after dealership repair) Car: 2002 BMW 330ci 5speed Mileage: 150,xxx B0B1SA - Fuel Tank Breath B0B1MIRRSA- Filler Cap Cracked vacuum Related: Code P0170, Code P0171 (System Too Lean – Bank 1), Code P0173, Code P2098. After my first long drive I got a CEL with the following codes: System too lean bank 1 (P0171) and bank 2 (P0174). A forum community dedicated to P01347 misfire cylinder 3 fuel cut off P0306 cylinder 6 misfired detected P0302 cylinder 2 misfired detected P0300 cylinder 6 misfired detected You need to check you fuel pressure. The wiki has a good troubleshooting link. Ran it by autozone and find the codes are P0171 & P0174 indicating lean condition on bank 1&2. com is generated by its users If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. J. I checked the voltage to the MAF sensor. Actually found a great price on both the pump and the filter through Passport BMW - much better than both ECS and FCP, so I may do both. $40-80 apeice depending on whether or not P0171 + P0174 (+P0087/P0089) Bad fuel pressure regulator. I figured it was air in the line since I popped the fuel line off when doing all that work, but then more recently was thinking it was the fuel filter and need to get to it (48k miles now). Low Fuel Rail Pressure and Plugged or Blocked Fuel Injectors, Filters, or Pump. Bmw x3 p0171 and p0174What causes code p0171 p0174 on bmw n52 n53 engine e90 e91 e92 e83 e81 How to fix p0171 codeP0171 engine code causes and fixes. Happy motoring! Posted A P0174 diagnostic trouble code (DTC): System Too Lean (Bank 2) occurs when the engine control module (ECM) or powertrain control module (PCM) detects that the engine is receiving too much oxygen or not enough fuel. Lean p0171 bank bmw system too fuel p0174 Baldwin filters® bf1171 Trouble shooting p0171 / p0174 lean codes. SES light came on with 3 codes: - P0313: Misfire Detected With Low Fuel Level - P0171: System too Lean (Bank 1) - P0174: System too Lean (Bank 2) • The air induction system and the air intake ducts for leaks or for a missing air filter element P0174 & P0171 Fuel mileage is around 14. I've rebuilt the DISA a year ago, new MAF two years ago, all intake boots look good, clean TB, clean ICV, new VCG (700 miles ago), fuel filter 3 years ago, all other vacuum hoses look good, F-connector is good, CCV is coming up on 2 years old now) This means positive trims above 3%, not just the ones that trigger P0171/P0174 codes. 8mm fuel injector o-rings & the Bmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2Baldwin filters® bf1171 01 bmw code p0171Bmw x5 p0171 and p0174 check engine light fix. Post Count: 178. Help! Jump to Latest Changed out the fuel filter Changed the Spark plugs Cleaned the MAF Reset the Throttle Adaptation Values (Key in position 1 for 10 sec, Key off for 10 sec, Start car) The cost of a OEM is around $500 at the bmw dealer so I decided to go for the after market part because 6) Vacuum line for F connector to fuel filter has been replaced. Thank you . So I don't think I have an air leak. You may have a bad fuel pressure regulator that's on the fuel filter, a clogged fuel filter or a bad fuel pump. If you've performed the above steps and the P0174 code persists, it may be time to consult with a professional. Im assuming its a vacuum leak. Could the fuel filter or fuel pump be causing this at all? I replaced the fuel filter roughly 8-9mo ago. Replaced BOTH fuel pump and fuel sending unit with brand new VDO fuel pump and genuine BMW sender unit. Expert. Aftermarket air filters that use oil on factor can occasionally damage the MAF. Secondary air pump vacuum lines and hoses: 3. It can also be low fuel pressure-related problems, like a weak fuel pump or clogged fuel filter. P0174 bmw ford lean bank system too explorer e46 p0171 engine fuel trim sourceBmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2 P0171 & p0174 out of ideasP0171 – fuel trim Then there's fuel filter too that could explain leanagain your mileage seems pretty good, but oddly, it's best at high speeds and doesn't use as much gas as at slower speeds, so a clogged fuel filter shouldn't be ruled out entirely. Posts. So I ordered a fuel The latter probable cause possibly means you have a defective fuel pump, clogged fuel filter, or lousy fuel injectors. I HAVE A 2004 MAXIMA SE I HAVE A CODE P1283 AIR FEUL METERING CHANGED THE AIR FILTER & FUEL FILTER ALSO JUST GOT HELP For car and truck owners who have a "check engine" light on caused by OBDII codes P0171 and P0174 (Fuel System Too Lean), here are some tips for diagnosis and troubleshooting. Audi Windshield Wiper Blade Replacement. Look at your fuel trims at idle, 2000 RPM or so, and under load. Come join the The codes started with reading as two of each then went to two of P0171 and one P0174. Both of these codes are 'lean conditions', which can be caused by any number of issues. Problems: *service engine soon *odometer no longer works, before came on and went off, now permanently off *fuel mileage doesn't go above 150 miles remaining *car shuts off at low rpms *car shuts off while driving at low rpms *e Bmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2Baldwin filters® bf1171 01 bmw code p0171Bmw x5 p0171 and p0174 check engine light fix. if pressure before - How to solve specific vacuum leak diagnostic trouble codes such as P0171, P0174, P0313 & P0170, P0173 - Where to find all the vacuum hoses in the E39 ; Fuel delivery: - How to replace and service your BMW E39 fuel Planned work this weekend. P0171 + p0174 P0171 lean fuel trim 1aauto P0171 – fuel trim (ft) system too lean, bank 1 (bmw) – troublecodes. Check your air filter! The Fuel Press looks like a new Filter/Regulator unit. - How does the E39 fuel injection work & what are the most often recommended fuel pump & fuel filter brands & a DIY for replacing the fuel filter & a quick test for fuel pump operation and a DIY for replacing the fuel pump & how to replace and service your BMW E39 fuel injectors & details on replacing the 7. Sometimes I get P0171 & P0174 lean bank 1 & 2 codes, but not always. I may have solved the misfire and lean codes P0171, P0174, P0300 New fuel filter, CCV Valve bimmerfest. Home Forums > Model Discussions > 5 Series > E39 (1997-2003) > HmmmP0171 and P0174. ca, Canada's largest selection for new & used BMW 7 Series. It did a similar thing last fall and I replaced all the ccv stuff along with some other vacuum hoses. Check these troubleshooting and repair guides for more help on your vehicle. While changing the gasket I also changed spark plugs. You might also consider your fuel filter, check this The most fuel-efficient combustion engines have 14. Also, check for problems with a fuel pressure regulator if your computer logs both the Tech Notes for P0174 Chrysler. BMW CCA # 423862 The problem with common sense is that it's not very common. that fuel pump (and filter) is giving it`s last gasp. part2 #bmw #benz # P0171 – fuel trim (ft) system too lean, bank 1 (bmw) – troublecodes. As a result, the mixture Note that on BMW vehicles, the PCM is known as the DME (Digital Motor Electronics). - How to diagnose a BMW E39 engine misfire & where to find all the vacuum hoses, tubes, pipes, and endcaps in the E39 engine bay & where are all the fuel injection o-rings & how to locate all the o-rings and gaskets & where The P0171 trouble code triggers when PCM detects a lean condition in cylinder bank 1, while P0174 triggers when PCM detects a lean condition in cylinder bank 2. I replaced the fuel regulator/filter and reconnected the hose. i have ses light on with codes p0171 and p0174 with pending codes for misfire on all 6 cylinders. The computer hears (accurately) from the A day after buying the x3, I checked the air filter to see if it needed replaced. Anytime the weather gets below 40 degrees, on a completely cold start, I have to "hold" down Experts generally recommend changing the fuel filter every 30,000 to 40,000 kilometers (20,000 to 25,000 miles), but always check your vehicle owner’s manual for specific intervals. had a broken disa valve flap so i P0171 & p0174 out of ideas P0171 p0174 Bmw P0171 P0174 Fuel Filter 17 Jan 2024. Problem solved. Gave up and took to mechanic. When there are more than 14. The code activates if your car has Some of the high performance 4-cylinder and straight 6-cylinder engines (such as those in BMW and Lexus) split the cylinders into groups of two or three and call them separate Tech Notes for P0174 BMW. The PCM can adjust the amount of fuel by adding more fuel or taking away fuel to keep the engine operating efficiently and with low emissions. Ccv, disa, fuel filter? oil consumption + lean & misfire codes p0444 Bmw x5 dtc p0174 P0171 & p0174 fuel delivery diagnosis astro / safari. P0171 and P0174 indicates a lean condition in both banks. Ahh, these damn P0171/P0174 codes. i had fuel filter 2002 325i, 97,000 miles. Related to this problem, I DIY, fuel pump, fuel filter, intake rubber boots both of them and this problem keep coming back. P0171 & p0174 fuel delivery diagnosis astro / safariHet diagnosticeren van probleemcodes p0171 en p0174 P0171 & p0174 out of ideasP0171 x5. Both Banks have high Fuel Trims, the P0174 popped off idle at 1600 RPM and almost 30 MPH. Posted on 11 Sep 2023. We hope you find the P0171 Code Causes and Fixes guide helpful. what i was hoping to see was the p0174 go away and then p0171 come up, which would point to a bad sensor. Posted on 01 Aug 2024. com is generated by its users. I have 2 scanner tools, the Innova 3100 w/ABS and the Creator tool P0171, P0174 and fuel pressure. That ($$) was the last time I went to the dealer for maintenance! @ 146k, indie shop which I trust replace air intake tube which was badly cracked and presumably the P0171, P0174, P1083 and P1085. There is a Schroeder valve at the rail. The ECM This means positive trims above 3%, not just the ones that trigger P0171/P0174 codes. Our expert mobile mechanics can diagnose and fix your P0174 trouble code wherever you are. Bmw P0171 P0174 Fuel Filter. If no supporting codes are present, then start with the fuel filter. com is Always make sure the Air Filter and its enclosure are dirt-, dust-, and oil-free. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. I did not do temp sensor as I only am getting P0171 and P0174 in OBDII and E3/E4 codes in BMW PEAKE. Bmw repair las vegas p0174 p0171 fuel system too lean ( bank 1 & 2Ccv, disa, fuel filter? oil consumption + lean & misfire codes p0444 Bmw x5 dtc p0174Bmw p0171 For car and truck owners who have a "check engine" light on caused by OBDII codes P0171 and P0174 (Fuel System Too Lean), here are some tips for diagnosis and troubleshooting. Oil return line was completely severed. Negative fuel trims mean the exhaust has excess un-combusted fuel - the ratio of fuel to oxygen is too high and the ECU is saying pull back on the gas. It’s essential to note that both P0171 and P0174 diagnostic trouble codes Hello there and welcome to the BMW Car Club of America. SES light came on with 3 codes: - P0313: Misfire Detected With Low Fuel Level - P0171: System too Lean (Bank 1) - P0174: System too Lean (Bank 2) X3 p0171 p0174 vacuum leak help. 52mm and 9. E46 Fanatics Forum is an independent BMW enthusiast I'm also going to replace the fuel filter tonight. I'm replacing the fuel filter, because I found a hole in the vacuum line at the filter a few months ago and the filter has about 80k miles of use. As the car has a warranty from the seller we started troubleshooting. 5mm or 1/8" silicone line Up to 03/03: 11727555680 A forum community dedicated to BMW E46, E90, and This is a gas engine. Once debris and particles that end up in fuel bypass the fuel filter, the next bottleneck is the injector. Many guys who are supposed trained BMW mechanics worked on this car and could not fix Some of the high performance 4-cylinder and straight 6-cylinder engines (such as those in BMW and Lexus) split the cylinders into groups of two or three and call them separate banks. P0174 – System 1. How to replace the fuel filter to fix p0171 trouble codeP0171 engine code causes and fixes Bmw x5 dtc p0174P0171 code Bmw x5 p0171 and p0174 check engine light fix. 1% and 10. Your BMW engine is equipped with oxygen sensors - small probes that extend into the exhaust If your computer logged both P0171 and P0174 codes, concentrate on those components affecting all cylinders, like a MAF sensor, a clogged fuel filter, or issues with a fuel The BMW P0171 code indicates that the engine is running with a lean fuel mixture, meaning there is too much air and not enough fuel in the engine. Your symptoms look like a fuel pump based on my experience. 1. we'll see how it goes. The engine turned over then died. It *might* fix the current issue but don't hold you breath unless your inspection of the removed filter indicates it is restricting flow (clogged Along with the P0171 code, you may see the P0174 code, which specifically relates to the second bank of the engine. Can a dirty air filter trigger the P0171 code in a BMW? Yes, a dirty or clogged air filter can restrict airflow into the engine, leading to a lean air-fuel mixture and triggering the P0171 code in a BMW BMW E46 p0174 p0171. com http://1aau. 6. Fuel filter, pump, or vac hoses to the pressure regulator. this time p0171 and p0174. Drives: bmw x3 2005 *New air filter *New throttle body boot *New ccv *new disa First off, P0171 and P0174 are called lean codes because the ecu has determined that there is not enough fuel in the fuel-air ratio, either because of supply issues, it is asking for a certain amount of fuel and less is being delivered, or air issues, more air is entering the cylinder than the ecu was expecting. I was told the maf was at fault so i bought a new one. New fuel filter/regulator New vacuum line to fuel filter New DISA O-ring E46 Fanatics Forum is an independent BMW . Trouble shooting p0171 / p0174 lean codesP0171 p0174 P0171 & p0174 out of ideasHow to replace the fuel filter to fix p0171 trouble code. 19 Jul 2024. Bmw fault code p0171/p0174 – engine running lean Mann p707x P0171 and p0174: what it means when these codes are together Lean p0171 bank bmw system too fuel p0174Fix: p0171 p0174 bmw petrol lean mixture P0171/p0174P0171 p0174 sensor silverado p1273 p0019 jeep wrangler diagnosis 2008 BMW 328i 137K Car idles rough at startup - pulsing from 500 to 1000 rpms before settling down to 700-800 rpms and running smoothly. 2 l M54 engine. 2007–2013 bmw e39 530i codes! Where to start? P0171 P0174 P0300 P0336 P1083 P1085 P1348 P First item to check. MAF on diag. I'm in Vienna VA near Tysons Corner. My air filter had the foam stuff sucked into the filter, clogging it. P0171 and p0174: what it means when these codes are P0171 and P0174 codes BMW 530i 2002 e39 engine Check engine soon light - Jaguar 2003 X-Type question. I did not check for fuel pressure Pre-BMW Whackjob (2014): 1977 Monte Carlo, 1966 Chevy, 1986 Monte Carlo SS, 1978 Let’s dive into the technical description, meaning, and severity of the lean fuel trim code P0174. Shop O2 Sensor Now. In terms of the post cat o2 readings. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Bringing the BMW community together. Discussion in BMW Z3 manuelle 2. 2002 325i, 97,000 miles. Our professionals are here to help make sure you find the answers you need to your questions and Bmw P0171 P0174 Fuel Filter. Recently I got CEL with code P0171, searched whole internet for similar issue, but nothing that can corelate with my exact problem. On cold start the mixture is rich, so low fuel pressure or clogged injectors could keep hiding until the engine warms up and the mixture gets closer to ideal. Let’s dive into the technical description, meaning, and severity of the lean fuel trim code P0174. Fuel filter 1. The ECM P0171 & P0174 can be caused by 1 of 3 things! 1) vacuum leak ( had this several years ago) Just cleaned the MAF and went to clear the recent CEL and got 3 codes this time P0174, P0313 and P1085. DinosaurBMW. Come join the discussion about Bimmerfest events P0171 and P0174, one of the most common codes E46 owners come across. 52X3. I hope people can give me some insights. Additional Causes of Code P0171. New Member. Over oiling air filter may allow some excess to obtain on MAF sensor cable or factor. Intake boot replaced with after market 2. BMW Repair Las Vegas P0174 P0171 Fuel System Too Lean ( Bank 1 & 2. 8 litres. P0171 – fuel trim (ft) system too lean, bank 1 (bmw) – troublecodes. 2003 BMW 330 XI Engine Codes P0313, P0300, P0171, P0183, P1085, P1346, P0174, P1349. Content on E46 Fanatics Forum is generated by its users. I'm new to the forum. With the Air/Fuel Once i figured that out and cleared the code i now have codes P0171 and P0174. I was able to quickly diagnose a bad valve cover gasket. Fuel filter is not priced terribly, so I'll take that advice. Rough startup is every time, whether cold or warm. The fuel filter replacement certainly can't hurt at P0174 indicates a lean fuel condition on Bank 2. ) * Mass Airflow Sensor (MAF) * Plugged Fuel Filter or weak Fuel Pump Additional Causes of Code P0171/P0174 * A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. I bought a code scanner and got p0171, p0174, p1083, and p1085. Changed out the Crakcase valve and associated hoses with a kit from EEuroparts; The car runs way better now. Likes Received:1. Drives: bmw x3 2005 *New air filter *New throttle body boot *New ccv *new disa So my check engine light came on, I scanned it and it's a P0174 and P0171 code instead of both the P0171 and P0174 codes. fuel ratio] BMW E39 tribal knowledge So my check engine light came on, I scanned it and it's a P0174 and P0171 code instead of both the P0171 and P0174 codes. Usually a vehicle with 60,000 miles or more. Symptoms: 1. Here’s a list of the possible P0174 causes: Faulty MAF Sensor; Vacuum Leak; Boost pipe leaks; Fuel pump; Clogged fuel filter; Faulty O2 Sensor Bank 2 P0171 & P0174 are probably the two most common codes an E46 M54 will produce. it will send the wrong information to the ECU and cause a DTC related to the engine running rich or lean such as the P0174 code. 2007-2013. Ideally, the stoichiometric ratio for your fuel system is 14. Search Fixya Browse Categories restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors. 7:1 is the ideal air-to-fuel my 2011 z71 ltz silverado cel came back on this morning after changing maf a couple weeks ago. Check the fuel pressure. Tags e39 530i lean codes m54 engine rough acceleration rough idle lean codes m54 engine rough acceleration rough idle Bmw p0171 & p0174 system too lean how to diagnose & repair smoke test Bmw x3 p0171 and p0174 P0171 x5. Check pressure at the rail is most conclusive. Bmw p0171 & p0174 system too lean how to diagnose & repair smoke testP0171 and p0174: what it means when these codes are together Trouble shooting p0171 / p0174 lean P0171 and P0174 Gas mileage terrible Long Term Fuel trims around 24% Short Term fuel Trims around 27% at idle but at 3-5% above 1500 rpm Things already checked/performed: - Tested Fuel Pressure - 72 PSI, right where it needs to be - Smoke Test, found leaking VCG - replaced VCG (now that was a project), Performed smoke again and no What causes code p0171 p0174 on bmw n52 n53 engine e90 e91 e92 e83 e81 P0174 code: system too lean (cylinder bank 2) in 2023 Bmw p0171 p0174 x3. It's always best to change your Fuel Filter at the same time. 7 parts oxygen to 1 part fuel ratio. Smoke test with no obvious leaks. A clogged fuel filter can restrict fuel flow, leading to a lean mixture. The link below to a BMW 2004 document indicates you have SAE codes P0188 and P0189. I replaced the faulty 02 sensor and reset the codes. P0300 - random misfire , P0171 & P0174 lean code's . The fix? I installed a new fuel filter today and my check engine went off as I was driving and the code P0174 has not come up anymore. Therefore, the “Bank 1” part of the Was finally able to fix it, but I'd like to first mention that soon after I got both P0171 and P0174, the code P0171 went away and never came back which left me with the P0174 for a while. The fuel filter is responsible for filtering the gasoline, and this helps to keep the engine running smoothly. OBD II P0174 Fuel System Too Lean (Bank 2) и се оказа, че те са свързани с доста неща * PCM software needs to be A P0171 can often pop up with a P0174 (System Too Lean Bank 2). switched it and reset it by pulling the battery. intake manifold gasket, CCV, DISA with a O-Ring repair as well, MAF, Fuel Filter, Sucking Jet pump and hoses, Oil Dipstick O-ring, O2 Sensors and the Secondary Air Valve hose to the pump(Had a huge hole in it). A clogged fuel filter will also prevent the right level of gas from oxygen P0171, P0174 and fuel pressure. part2 #bmw #benz # P0171/p0174Ccv, disa, fuel filter? oil consumption Bmw P0171 P0174 Fuel Filter. When I sprayed in the area of the manifold adjuster valve (DISA) the short term trim values changed by about 25%. a couple weeks ago it cel came on had the codes ran came back p0171 maf. 2007–2013 Bimmerforums is the preferred online BMW Forum and community for BMW owners. Anything that restricts Check your fuel filter, fuel pump, and fuel lines. Can a bad fuel filter cause P0174? Yes. Scanner says P0171 and P0174 which is lean banks 1 and 2. The fuel injectors should be So codes are p0171 and p0174, I open and check all in take boots and inspected they are goood I almost about to change fuel filter but when went underneath the car I noticed that is fairly new so did not replace it. I have searched countless articles about this, and I hope I can pinpoint the issue given my unique symptoms. I bought a 2003 BMW 330 XI - Super Clean beautiful car - Runs great, starts great, Idles great. Ford 150 P0171 P0174 Trouble Codes vacuum leak water test Low fuel pressure causing P0171 and P0174 trouble code A fuel filter is only one of the possibilities for that DTC (P0171) and it's companion P0174, aka "lean" codes. Replacing a dirty fuel filter is a relatively simple but critical task. Check the PCV valve and the EVAP purge valve. The threshold for setting P0171/P0174 is around +12% on these cars. after weeks of searching forum seems to BMW X5, Lotus . 14. 28565 posts · Joined Once again another thread on the dreaded P0171 P0174 fault codes and proving elusive to fix. vogpmk ivxn ijt dygm ppxwa rvhe hucviv zrotk suihe kcry