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p0171

  1. 9/30 UPDATE: OBD Log Files For Bad Idle

    General E46 Forum
    ******UPDATE 9/30****** BaliDawg helped me out big time by updating my DME on 9/12 which was the factory firmware version from 2003-2004. For about 400 miles my car has been running flawlessly; the usual hesitation/studder at 2,800 rpms is gone and my idle issue seemed to be fixed. Within the...
  2. Stupid P0171 and P0174 Lean Codes

    General E46 Forum
    Hey everybody, I recently picked up a 2004 325i and I'm looking for some advice with the infamous P0171 and P0174 lean codes. I've tried a few super easy and cheap things that I figured would be a good place to start before spending large amounts of money on parts. Some background on the car: it...
  3. P0102 followed closely after by P0171 & P0174

    General E46 Forum
    Hey guys, I searched the forums already and saw some issues similar to mine but nothing 100% similar. About 4 days ago, I got a P0102 code. I decided to grab some MAF cleaner and hit my MAF up a little bit and clear my code too see if that fixed it. So no biggie there. Following this, about a...
  4. P0171 and P0174 Help

    General E46 Forum
    Hi. I have a 2000 bmw 320i with 213k kilometers. It has the M54B22 engnine. My car threw P0171 and P0174 along with codes for camshaft position sensor. So i fixed the camshaft position sensor and decided to try and tackle the P0171 and P0174. I found out that the CCV system was broken so i fixed...
  5. Ok I'm running out of ideas - Lean codes

    General E46 Forum
    P0174 - System Too Lean Bank 2 P0171 - System Too Lean Bank 1 P0313 - Misfire Detected With Low Fuel P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) I thought it was a vaccum leak and a BMW/German auto shop do a full replace of the vanos line and the...
  6. Another Persistent P0171 and P0174 Situation

    General E46 Forum
    Long time lurker, first time poster. Sorry for the long post, but I can't seem to eliminate the lean codes and misfires at low RPMs. I'm a mechanic, but generally work on classic cars from the '60s through '90s, though I'm no stranger to modern cars. This, however, is my first BMW...
  7. E46 Excessive crank case pressure

    Forced Induction Forum
    Welcome. Thank you for looking at this post! I will give a short topic point to help any one who may have quick and easy information, then I will proceed to post detailed information about my E46. --2001 330CI 3.0L __NEW PARTS__ -valve cover gaskets full set felt pro -rebuilt the VANOS -fuel...
  8. Rough idle with random rev

    General E46 Forum
    Hey guys, First post! I was hoping that I can just find some answers lurking, but seems to me that my specific problem wasn't shared by anyone else. So here it is...My SES light was one a few months ago when it was really cold, my car died after backing out of a parking spot and driving in 1st...
  9. Cold Start / Rough idle, not vacuum, nothing ordinary or usual to blame

    General E46 Forum
    I apologize - I know there's too many of these, but I didn't want to hijack another poster's thread, and the resolution to my issue may take a different direction. I've read every thread I could find here and elsewhere, and have eliminated many of the common diagnoses for my Lean Code...
  10. help :-(

    General E46 Forum
    been trying to find the dreaded cause of P0174 & P0171 codes. I have tried Cleaning maf (looks pretty new anyways) Checked disa and is working properly and o-ring looks good Checked intake boots for cracks/holes etc... Checked for leaks with spray and listened for engine changes. Checked cover...
  11. Help to analyze freeze frame and fuel trim data.

    General E46 Forum
    I have two error code P0171 and P0174. I attached the freeze frame and some fuel trim data. Please look at it. It looks like a vacuum leak. I checked all common areas, but found nothing wrong. The intake boot is new, CCV is new, and VCG is new. Follow Scotty's smoke test method, but found...
  12. Strange problem with LTFT

    General E46 Forum
    My 2005 E46 325i has SES light on. The codes are P1701 and P1704. The long term fuel trims are |Bank 1 | Bank 2 | Idle |15% | 23% | 2500rmp |3% | 9% | I tried a smoke test. There was no smoke leaking. The strange thing was that after the smoke test, the...
  13. P2096, P0174, P0171. hopefully fixed and what i learned.

    General E46 Forum
    Ive been chasing the solution to these codes for almost a month know, has caused many headaches. To start, I figured vaccum leak simply because well the codes imply the car is running lean and I didn't figure fuel problem because the car didn't bog or have a rough idle. only time it would rough...
  14. 2003 E46 330 Lean Codes. Help!

    General E46 Forum
    Hi everyone, First of all I am a newbie to these forums and I want to thank you all in advanced for any help I receive. I have a 2003 330CI and I am getting lean codes and have a slight misfire. I have a full scanner that gives me all of the bmw codes but the only ones present are P0171 and...
  15. E46 Diagnostic Live Data Help to Review

    General E46 Forum
    Numbers of DTCs 0 Fuel system 1 statusCL Fuel System 2 statusCL Calculated Load Value(%)51.8 Engine Coolant Temperature(¡£F)204 Short Term Fuel Trim -Bank 1(%)1.6 Long Term Fuel Trim - Bank 1(%)3.9 Short Term Fuel Trim -Bank 2(%)0.0 Long Term Fuel Trim - Bank 2(%)3.1 Engine RPM(rpm) 1984...
  16. Fuel Pump Replacement Guide

    General E46 Forum
    I do not know If there are any guides to replace just the pump on an E46, but I have made one after not finding anything about it. All I could find was just replacing the whole sending unit and pump. I had lean codes on and off for about a 2 years with my 2004 330 CI. It has 160k miles on it...
  17. Service Engine Soon p0171 p0174

    General BMW E36 Forum
    Just bought a little silver 2005 325ci with a black canvas top. 135,000 miles Service records looked good. Not two weeks later my SES light comes on. AutoZone says p0171 p0174 Local mechanic says he knows the problem and it costs $800 (Pvs or PVC something) Bimmer doesn't overheat...
  18. SES light P0171 P0174

    General E46 Forum
    Just bought a little silver 2005 325ci with a black canvas top. 135,000 miles Service records looked good. Not two weeks later my SES light comes on. AutoZone says p0171 p0174 Local mechanic says he knows the problem and it costs $800 (Pvs or PVC something) Bimmer doesn't overheat...
  19. System Lean Both Banks P0171 & P0174

    General E46 Forum
    I have a 2004 E46 325CI with the M54 engine in it. A few weeks ago, my check engine light came on. I didn't think much of it as I was getting on the throttle pretty good getting onto the interstate (figured it was just a retarded O2 sensor due to my lead foot). Took it to the shop to get the...
  20. P0171 P0174 Lean Codes

    Driveline, Engine & DME Tuning
    The car runs fine so I have ignored these codes for a while now but smog is due so it is time to fix. These codes indicate a lean condition which is usually attributed to a leak in the intake system. The usual suspect is the DISA valve or the intake boots. I used this opportunity to build a...
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