P0174 bmw e46. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Dec 8, 2011 · hi all,po174 bank 2 to lean,,,what does that mean guys,i erase the fault with me thingy i bought,but comes on after about 250 miles,,,,any ideas guys,,,thanks pete,,uk: Apr 18, 2020 · Hello, I have been working to resolve rough idle and "check engine"/SES light with codes P0171 / P0174 (system too lean). The ccv was replaced, I replaced the O2 sensors (upstream ones), checked and replaced the intake hoses and DISA. I shut the car off and was able to restart it, so I went inside. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Apr 8, 2018 · Hey guys, so I have these two codes come up which has caused my Service Engine Soon Light to come on (P0171 & P0174). So I thought the problem was somewhere in fuel system, so I've replaced fuel pump, fuel filter, used seafoam, fuel system cleaner but nothing solved the problem. Is there anything else I should mention to the mechanic before connecting? I have replaced the O2 sensors, camshaft sensor, plugs, injectors, and MAF. And the engine light came on so I read it with my pocket reader. The car is bmw e46 330 2002 with automatic transmission. Note: Some references indicate "too rich" instead of too lean (this is confusing). comFor apparel: https://teesp Sep 1, 2020 · I started getting the dreaded codes P0171 & P0174 Lean mixture banks 1 & 2 on my '05 E46 330ic with 93k miles. I love the car except I'm being driven up a wall by this engine light. After fixing almost all of the codes on it since I bought it (like 9), these are the only two left. VACUUM LEAK BMW E46 E39 E53 383 X3 X5 Z3 Z4 E60 Totally Destroyed BMW Car Repaired by Professional Mechanic | by @Arthur tussik Mar 14, 2010 · I was driving home last night when my SES light came on. Before doing anything else, get OBD Fusion running and log the data Bali mentioned in post #4 (fuel trims, maf, etc) it should help narrow things down. Everything went smooth when I put it all back together. what can it be Oct 17, 2011 · Code P0174 mainly applies to V6 or V8 engines because 4-cylinder engines generally have only one bank, though there are a few exceptions. J'ai 2 codes défauts liés à ce voyant moteurs qui sont P0171 (System Too Lean) et P0174 (System Too Lean). The solution was replacing an o-ring. I'm fully aware these are primarily caused by vacuum leaks, and as such over time have replaced nearly everything known to cause these, yet I can't make heads or tails of my STFT, LTFT, MAF, and 02 Bank 1 data Mar 14, 2013 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Started driving the E46 to get it ready for smog testing and BAM! Check Engine Light. no one seems to think the Oct 25, 2018 · A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. P0171, P0174 - system too lean, bank 1 and bank 2. If you’re experiencing this issue, it’s Apr 23, 2023 · P0171 and P0174, one of the most common codes E46 owners come across. Thank you all who helped out in my previous post Feb 8, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. so if that's true, then there could be a leak on the bank 2 gasket. It started with chirping. When I'm doing diagnosis, I use total fuel trims (short term + long term) per bank as this give the full view on the fuel trim. History: Had P0171 & P0174 codes Believed it to be CCV. Jan 19, 2024 · So my 2004 bmw 325i is showing only a p0174 code. 0:00 Aug 8, 2020 · Today I repair a vacuum leak on my 2004 BMW E46 330CI. Jun 5, 2015 · 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 Feb 18, 2023 · The BMW scanner yellow codes are consistent with the codes Autozone told you. P0171 BMW fault code symptoms, causes, diagnostics, and fix. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Mar 26, 2023 · P0171 & P0174 are probably the two most common codes an E46 M54 will produce. Does anybody have any experience with these codes together? Jan 16, 2013 · Code Reader https://amzn. 5K subscribers Subscribe Oct 21, 2010 · Well I've had these codes for an year, I finally solved it. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Jun 28, 2023 · Learn about BMW fault code P0171 - bank 1 too lean. 4 so i recorded the fuel trims but i don't know what the values should be, took a picture of the live values Bmw 330i with 170k miles CCV replaced, valvecover gasket replaced, SAP vacuum lines replaced. Dec 25, 2023 · [résolu] Voyant moteur et codes défauts P0171 P0174 par Dragon 548 » 25 déc. I go thru some of the common areas to test and how the MAF readings led to finding a plugged up air cleaner E39 E53 383 X3 Oct 16, 2009 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Both of these codes are 'lean conditions', which can be caused by any number of issues. Today the car won't start, it just cranks. I kept getting different codes, P1083, p1084, P1347, P1348 Dec 2, 2013 · Hi there! I got 8 codes on my BMW 320 2001 P0172 System Too Rich Bank 1 P0174 System Too Lean Bank 2 P0300 Random/Multiple Cylinder Misfire Detected P1350 Misfire during start cylinder 5 P1345 Misfire cylinder 2 with fuel cut - off P1348 Misfire during start cylinder 4 P1352 Misfire How to diagnose BMW E46 E39 E53 Vacuum leaks Lean codes P0171 P0174 for the M54 M52tu DIY Smoke Machine For Vacuum or EVAP Leaks E46 P0171 P0174 Jan 12, 2013 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. 1K views 22 replies 9 participants last post by SPDSKTR Sep 12, 2018 T Customer: Keeps displaying codes P1342, P1347, P1348, and P1350. This did not fix the problem with the codes and rough idle. Jul 15, 2010 · Code P0174 mainly applies to V6 or V8 engines because 4-cylinder engines generally have only one bank, though there are a few exceptions. To attempt to solve these codes, I tried the "MAF Test", which is unplugging the MAF sensor while the engine is running and if the car does not shut off then you need to Jun 7, 2014 · P0313 BMW 238 to BMW 243 inclusive, Misfire Detected with Low Fuel P1083 BMW 202, Fuel Control Limit Mixture Too Lean (Bank 1 Sensor 1) P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) Clearing yet again, and driving for a dozen additional miles, I found, in this order when I shut the engine down to look for Feb 5, 2021 · About 3 days ago I finished installing the started on my bmw e46 2. Last week Bimmerforums is the preferred online BMW Forum and community for BMW owners. with both codes, everyone was saying things that would apply to both banks. This time took it to a different garage. Odd, I thought. The car idles worse when cold and just a little better when warm PDA View Full Version : fault codep0174 Scorpius 12-01-2011, 05:24 PM Dec 15, 2024 · Hello! I have a 04 325i, and recently while I was just letting my car warm up, I first got the P0411 code. P0174 / P0171 (2882/2883) codes SOLVED with new fuel pump! Finally! Spent nearly two weeks hunting down this problem. When I was driving it later on, I got codes P1083 p1085 p0171 p0174. 3K views 31 replies 11 participants last post by OnTheFence Dec 23, 2016 A Feb 13, 2025 · Hi all, In need of some help. Come join the discussion about Bimmerfest events, BMW production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Bringing the BMW community together. Once we get the problem fixed, then look at the Long terms again. When it gets bad it causes P1071/P0174 codes and also various misfire codes like P0303, etc. It's not that difficult nor expensive to resolve this issue and the end result is a better running car. Cambié la bomba de May 23, 2015 · My wife's 2006 E46 convertible with 84k miles just had all vacuum hoses, rubber parts and fuel pump replaced last November as PM. so a vacuum leak and i see a smoke test and DISA re-seal in my future. Anyone know where this is located? Are all the O2 sensors the same part? Jun 5, 2015 · 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 had moderate power loss and the car began running sluggishly so I drove it home. Here's the long story: My starter was going bad, so I replaced it with a new Bosch unit. Aug 9, 2015 · How to diagnose BMW P0171 P0174 lean codes E46 E39 E53 BIMMER ZEIT 48. 2023 19:41 Bonjour à tous Je rencontre un souci avec un voyant moteur dont je n'arrive pas à ma débarrasser sur ma E46 moteur M54B30. I clean the MAF sensor every year. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Sep 27, 2010 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Just as a background the car is a 2005 with 115K on it, bought it with 99K on it. Mar 28, 2011 · Hello, An auto parts place checked the ODB code of my '03 E46 and found P0174. Feb 2, 2022 · Hidden Test Menu on Instrument Cluster O-Ring & Washer Fix for Leaking Selector Shaft Seal (GM Auto Trans) Genuine BMW CCV Kit ($60-ish: ccv & 2 hoses) 11 61 75 34 237 Reply Like A alan_325xi Discussion starter Feb 23, 2025 · ¡Hola! Nuevo en el foro y ahora que estoy atascado tratando de deshacerme de CEL, estoy pidiendo ayuda. Took it to garage and got them to change the CCV and a manifold gasket. Took out the Acutron scanner and got several different codes. Don't take advice from an auto parts counter jockey and buy the parts they suggest. I was told the maf was at fault so i bought a new one. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Nov 26, 2010 · About 10 days ago my car was idling very rough. In this article, we’ll provide expert guidance on fuel system issues and help you discover the meaning, causes, symptoms, and fixes for the BMW P0174 code. And it did run fine, check engine light wasn't on any more and the car BMW CODE P0171 P0174 SYSTEM TOO LEAN FIX. Customer: Just looking as my e46 330xi MY2001 has a nagging P0171 and P0174 pending errors that eventually pop up. Codes were P0172 (Too Rich Bank 1) and P0174 (Too Lean Bank 2) Checked the Update: No more check engine light after previously having P0171 & P0174 codes. i bought the car two months ago with leaking valve cover gasker and faulty thermostat. Jun 18, 2017 · Long story short, I purchased the vehicle, and these codes were on. It almost sounded like a hollow whistle coming from under the hood and it would go away after 10 minutes. HAHA! What a pain in the rear that became! The plug in cyl 5 didn't want to budge so I got my husband to "do the deed" for me. I pulled & inspected the intake boots & F connector, no cracks. Ok so I am throwing the P0171 (Bank 2 too lean) code as well as a Oct 4, 2020 · Hi! So I have been dealing with the dreaded P0171 and P0174! My car was running fin until a couple days ago when it acquired a rough and shaky/studdery idle and just got so bad if u tap the gas after a cold start it will die out. 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. Dont know if other parts have been replaced Mar 3, 2016 · It's been a few years. The car is running fine but those codes keep coming back!!! :crying Any suggestions for where to look next??? Thanks in advance! That’s definitely a vacuum leak issue. Not sure what happened. P0170,P0173, P1188,P1189 they are all related to fuel system. I bought a code scanner and got p0171, p0174, p1083, and p1085. Apr 13, 2025 · BMW fault code P0174 signifies a lean condition on engine bank 2, suggesting an imbalance where there's too much air and not enough fuel in the air-fuel Feb 23, 2025 · Hello! New to the forum and now when I’m stuck trying to get rid of CEL I’m asking for help. The smaller hose had a tear about 1 inch long. Did a smoke test, didn't see anything. Cleared it, then drove it around for about 30 minutes. One weird thing I should point out is the codes popped up right after I replaced my exterior temperature sensor, could Mar 20, 2021 · A lean condition (positive fuel trims) is where the money is for our aging e46s. I’m thinking that since it is only for bank two and not both banks then there most likely wouldn’t be a vacuum leak. Does this combination of codes point to any specific thing to replace/fix? I got a new gas cap, and I’m about to order a new purge valve but idk if that’s going to be the fix. I took off my intake in order to have easier access to that oil filter. What is BMW P0171 fault code? Jun 19, 2010 · P0174 = "System Too Lean (Bank 2)" on a 2002 525i at high altitude (3,500 to 4,500') 2002 BMW 525i P0174 OBD-II trouble code compendium: P0174 = "System Too Lean (Bank 2)". I ignored the light for a little while and ended having to change the Catalytic converters because they where completely clogged up (don't get me started on this). Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Apr 4, 2014 · Hello. Usually, if the Oct 23, 2023 · The P0174 Code can come up for many reasons and is one of the most common DTC's your E46 will ever show. Apr 13, 2025 · What does BMW fault code P0174 mean? BMW fault code P0174 indicates “System Too Lean (Bank 2),” meaning the engine’s computer has detected too much oxygen in the exhaust gases for engine bank 2. This is a great place to start if you've got this very common problem In this video I go over the most common causes for the p0171 and p0174 codes. bensound. The link below to a BMW 2004 document indicates you have SAE codes P0188 and P0189. There are a number of reasons you can have that code and they need to be tracked down. Here's my data: 2002 BMW 325xi about 140,000 miles. The car was drivable, so I cleared and re-read the codes for 2 or 3 days. Jun 28, 2010 · P0174 - System Too Lean (Bank 2) My check engine light came on today. Found out there was an air leak. Sprayed the MAF sensor off with solvent too. I get the two codes P0171 and P0174. Then I was just idling it in my driveway and then the P2098 code came up. Aug 19, 2009 · When I got the codes (and rough idle), I searched for vacuum leaks and found the common one where the intake hose connects to the throttle body. Anyways. I cant wait until my CEL finally stops burning a spot in my peripheral vision. Apr 26, 2022 · Has the P0174 BMW code popped up after an OBD2 scan? Don't worry; our detailed article has everything you need to know to solve this trouble code! If you’re experiencing this issue, it’s important to understand the causes, symptoms, and possible solutions for this code. How many parts do I need to clean or replace before the SES indicator goes out? I thought the code was supposed to point to BMW P0174 Code : Mixture Control 2 System Too Lean Bank 2 As a car owner, it can be frustrating to encounter issues with your vehicle’s fuel system. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Mar 29, 2017 · P0174 System Too lean Bank 2 Let the fun begin I have a 2006 E46 BMW 325CI. So I was looking tirelessly for a vacuum leak. Changed water pump, thermostat, valve cover gasket & Please also take a look at these other videos I've published: E46 Common Repair Steps • BMW 330i 325i E46 Common Repair Steps DIY E46 CCV Replace & Intake Removal (Part 1) - See It Clearly! Apr 6, 2021 · The general consensus is that a BMW with long term fuel trims in the +/- 4% range is OK. Got car back, Had P0102 error, MAF messed up Replaced MAF with original. They redone the work the first garage did and sorted out that air This E46 came in with DTC's P0171 & P0174 codes for lean running engine. Cleared that. CCV has been replaced. Yes. VACUUM LEAK BMW E46 E39 E53 383 X3 X5 Z3 Z4 E60If you have BMW and you have code P0171 System Too Lean Bank 1 or co Mar 26, 2017 · For some time now I have repeatedly had a check engine light and the following codes: P0171 Bank 1 system too lean P0174 Bank 2 system too lean Everytime I erase the codes, they return in about a week. Took it to Auto Zone and the friendly clerk said it is probably the rear upstream O2 sensor. I erased the codes but the SES light came back on after driving for about 30 minutes. Jul 21, 2012 · 2003 BMW 330 XI Engine Codes P0313, P0300, P0171, P0183, P1085, P1346, P0174, P1349 91349 p0171 p0183 p0300 p0313 Jump to Latest 25K views 12 replies 9 participants last post by tomoyer Jul 21, 2012 Sep 25, 2011 · Bingo!! I may have solved the misfire and lean codes P0171, P0174, P0300 | BMW Forum - BimmerFest BMW Forums Home Forums BMW Discussion 5 Series E39 (1997 - 2003) Nov 30, 2013 · DIY E46 Merit Badges: Sunroof resurrection (Thrice!!!), CCV, OFHG, VCG w/ VANOS seals, DISA, Cooling Refresh I, steering giubo, window regs, Magnetic Infandibulator (see wiki) Nov 30, 2013 · DIY E46 Merit Badges: Sunroof resurrection (Thrice!!!), CCV, OFHG, VCG w/ VANOS seals, DISA, Cooling Refresh I, steering giubo, window regs, Magnetic Infandibulator (see wiki) Jun 23, 2024 · Hi, I've had problems with the p0174 p1085 p1083 p0171 codes since i bought the car and recently the CEL just disappeared, Just got my BMW scanner 1. You all know the drill to do this, you need to remove the intake Manifold & unplug just about every sensor & vacuum hose on the M54. 5, installed a new air intake manifold gasket, throttle body gasket, cleaned the injector, new vacuum caps and lines, new disa valve, cleaned my MAF sensor. Any help. If they get to +/- 8%, then you have problems to find. Feb 23, 2025 · Now after 20 min drive I get pending p0174 & p0174, do I have to drive a longer time after replacing vacuum hoses to learn the car new values? I checked MAF and it works. What else could be the cause? Feb 21, 2007 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Haven't been driving the E46 much until recently since our Trailblazer got totalled a few weeks ago. Car: 2002 BMW 330ci 5speed Mileage: 150,xxx B0B1SA - Fuel Tank Breath B0B1MIRRSA- Filler Cap B1SA - Pressure Regulating B1SA- Vent Pipe B1SA- Connecting Line B1SA-Return pipe Dec 27, 2023 · Learn how to address P0171 & P0174 codes by fixing the most common vacuum leaks in BMW E46 and E39 models. To help find the root cause, you should look at the freeze frame data of when the code was triggered. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Jan 2, 2012 · Your INPA in showing BMW codes 227 and 228 that are not indicated as SAE codes P0171 / P0174. And had a very bad idle. Compré el coche hace dos meses con una junta de la tapa de la válvula con fugas y un termostato defectuoso. . 00 from the local BMW dealer. 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. 95% of you who have this problem will be covered by this video. Jul 22, 2014 · A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. I ended up replacing a few other parts such as icv grommet, tb gasket and some vacuum lines Sep 9, 2018 · Multiple codes:P0174, P0171, P0303,P0306,P0313, P0302, P0304, P0301, P0174, P0171, P0 Jump to Latest 4. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Dec 20, 2016 · BMW E46 p0174 p0171 Jump to Latest 5. Jan 6, 2015 · My SES light is on. car runs fine. The engine would shake and grind for no apparent reason. When the problems started, I had the dreaded P0171 P0174 codes. i had noticed on the 04 xi the STFT both banks slowly climbing up to 15-16 over the last couple of weeks. so what would allow the car to run perfect, yet throw the p0174 only code? i read somewhere that the intake gasket was split into bank 1 and bank 2. To my knowledge these codes mean my car is running lean correct? Well so far I've replaced the intake boot, mass air meter CODE P0171 P0174 SYSTEM TOO LEAN VACUUM LEAK FIX BMW E46 325I 330I 328I 320I 323i 325xi 328xi 330xi 320xi 330CI 325CI 320CI If you have BMW and you have code Dec 6, 2018 · Hello, sorry if I speak English badly I have a little trouble on my E46 320Ci convertible : I have the error code p0174 and p0171 system too lean bank Oct 31, 2016 · So I recently got both these codes and have looked at the common culprits (ccv, intake boots, Disa valve, looked for vacuum leaks) and haven't been able to resolve the issue. I knew that a "Happy Wife = Happy Life". Oct 17, 2023 · Summary, causes, symptoms and repair steps: What does BMW fault code P0171/P0174 mean? A BMW fault code P0171 or P0174 means that your engine is getting more air than fuel, also known as running "lean". "P1348 Misfire During Start Cylinder 4 (BMW)" Does anyone know what this means and how I can resolve Mar 21, 2025 · 2001 330i ~185k For years I've been chasing stubborn P0171/P0174 codes. Any help on what the issues for these PDA View Full Version : fault codep0174 Scorpius 12-01-2011, 05:24 PM Feb 3, 2013 · P0313 BMW 238 to BMW 243 inclusive, Misfire Detected with Low Fuel P1083 BMW 202, Fuel Control Limit Mixture Too Lean (Bank 1 Sensor 1) P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) Clearing yet again, and driving for a dozen additional miles, I found, in this order when I shut the engine down to look for Nov 20, 2024 · So I bought my 2004 325ci a year ago and it had a check engine light come on with p171 and p174 ( BMW oem enhanced codes are 2883 which is just fuel air mixture not present on banks 1&2 in BMW as we all know) and my friend said that we probably could fix it very easily so I purchased the car OKay, I'm getting the usual P0171/P0174 codes. I pulled the P0171 & P0174 Bank 1 and 2 running Mar 1, 2012 · Decided to buy an OBD scanner and gave me the P1351 code so I figured it was the ignition coil and/or spark plug. Does anyone know what could be throwing this code? Oct 13, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. El coche es un bmw e46 330 2002 con transmisión automática. I've read about a dozen Bimmerfest threads about this and I now have to ask this question. What’s the year and model of my BMW? Also, I have the codes P0171 and P0174. This code indicates that the Mixture Control 2 System is Too Lean in Bank 2. In this video, I solve the engine codes P0171 and P0174; which signify a lean condition on both banks of cylinders. I replaced this part and was very happy since it was just $13. I own a 2002 330ci BMW. The plug came out in one piece but the threads on the bottom 1/8" or so were Feb 28, 2014 · A forum community dedicated to BMW owners and enthusiasts. After I got it all back together i was left with a nasty Apr 1, 2011 · All, First let me tell you that I can't thank you enough for the knowledge I have obtained from you over the last year I have owned my BMW 330i. Took it to the dealer and this is what they did. Dec 6, 2010 · Thread: 2004 BMW 325i e46 OBD Codes P0174 & P0171 Thread Tools 12-06-2010, 10:22 PM #1 dudley237 Mar 15, 2015 · Hello everyone I just joined today and Im a new proud e46 owner. Mar 22, 2015 · Brought it to a BMW shop today in Norwood MA they were quite clueless told me air filter or o2 sensors and well that's what I forgot both my post cat o2 sensors are new. Yesterday, for the second time at Apr 11, 2025 · BMW code P0171 and P0174 indicate lean conditions in engine banks 1 and 2, respectively, but the solution involves systematically diagnosing and addressing BMW CODE P0171 P0174 SYSTEM TOO LEAN FIX. These codes are set by the o2 sensors detecting a lean condition on either of the banks. to/3ES6aK0 Well it something happened when I changed the CCV Valve, VCG and the Sparkplugs in my E46 BMW 325xi. And then earlier today, I got a current code if the P2098 code again, and a pending code of the P0174 code. Dec 9, 2005 · So this is the second time my 2001 BMW 325Ci is having this problem. Did you smoke test the engine yet? Last time I got these codes, my vanos seal and intake boots were trash. This is how I cleared the codes P0171 & P0174Music: https://www. P0174/0171 is a general system too lean code, which means the engine is either getting too much air or not enough fuel in the mixture. So why do we get lean conditions? Why would the exhaust indicate less fuel or more air as read by the pre-cat sensors (the trigger for additive trim)? Nov 5, 2024 · Hi all, So I too have these codes on my E46. I did am oil change today. Aug 19, 2024 · Potential causes of code P0174 in a BMW include a vacuum leak, faulty oxygen sensors, a dirty or clogged mass airflow sensor, fuel delivery issues, or a malfunctioning fuel injector. Jul 22, 2025 · P0171 P0174 codes 1 reading Jump to Latest 198 views 5 replies 3 participants last post by Sapote 15h ago Any advice? Code P0456, P0442, P0174, and P0171. Some background information about my car: its a 2001 330Ci Dec 6, 2019 · today i joined the P0174 club (**at highway cruise same as OP) . Oct 11, 2010 · I only have the p0174 code. One of the most common diagnostic trouble codes (DTC) related to the fuel system in BMW vehicles is the P0174 code. I figured while I was in there doing the coil I might as well do all 6 plugs. aaz jiequ 71ym veyfkpg d8j hjz xu cxn hc fax