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p0174
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  1. E46 M3
    Hi all, I have a custom built E46 M3, we are facing an issue which we could not solve yet, and we are running out of ideas. The problem started with a hesitation during acceleration, it is more noticeable in higher gears, e.g.: pull in 5th gear, but I can feel it in 3rd gear, and even in 2nd...
  2. E46 General
    Hi everyone, I just replaced my motor mounts and used an engine support bar to lift it up a couple inches. I drove a bit after the install and got an SES, just a p0174 code. Any first thoughts as to what I may have pulled/stretched/cracked/etc. by lifting up the engine? Intake boot on top looks...
  3. E46 General
    Replaced the thermostat and the water pump recently, and changed out the coolant (which if it helps any, my car did not take alot of new coolant only about a gallon, despite me draining it as best I could, but the car isn't over heating and the temp gage stays steady in the middle, maybe an air...
  4. E46 General
    A little while back I had a lean code (P0174) throw and I posted on here about it. I ended building a cheap smoke tester and tried that out. I couldn't see any visible smoke, even after multiple different tries. (Yes I removed the oil fill cap and let the crankcase be filled with smoke, the put...
  5. E46 General
    I'm doing my vcg this weekend and replacing all my vacuum lines. while I'm under the good, I'm not sure what size hose, shop life on YouTube said 5/16ths, fcp euro on the other hand has like 4 different size hoses. I cant seem to find much about vacuum lines on this forum. could anyone help me out?
  6. E46 General
    Hello fellow e46 owners I have a p0174 lean code not both the p0174 and p0171 just the p0174 there’s no cracks in intake boots I replaced the valve cover is there anything anybody can think of it is also worth mentioning that the idle can be wonky as in it’ll fluctuate and also go to about 800...
  7. E46 General
    I have been trying to diagnose and remedy this problem for several months, and now I need the to call on the collective knowledge of the group. It all began when SES illuminated one morning as I was on my way to dealer for routine maintenance. The car was behaving normally on the roughly one...
  8. E46 General
    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...
  9. E46 General
    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...
  10. E46 General
    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...
  11. E46 General
    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...
  12. E46 General
    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...
  13. Forced Induction
    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...
  14. E46 General
    PROBLEM A I won't be able to start the car up until I get a replacement starter. Before that exploded on me, I was getting the following codes. The car would also shake at idle and low-rpm power was awful. Here's what my Autel MD-802 gave me. Codes were in this order: P1347: Misfire cylinder...
  15. E46 General
    jfoj: 2004 330 ci, ~174,000 miles, all stock equipment First let me say thanks to you for all of the posts/replies you have made that have helped me and many, many others. Thanks to you, I have made great strides in learning about this car, which is really my son's, but I enjoy working on it...
  16. E46 General
    I have an intermittent check engine light with P0174 (Bank 2 system too lean) and P0172 (Bank 1 system too rich). I just replaced the cylinder head, and a lot of the vacuum lines were old so I replaced everything that I saw. The CCV is new. All gaskets were replaced. There is one line, however...
  17. E46 General
    So a few weeks ago I got a CEL with a P0174 code and a code for bank 2 pre cat o2 sensor. I replaced both bank 1 and 2 pre cat sensors. Cleared the codes then a few days later got the P0174 code again. Last weekend I cleaned the MAF and quickly checked the upper intake boot for rips and didn't...
  18. E46 General
    Lean Condition , misfiring followed with low cat efficiency added on top to that. To all who can contribute any solution to the posted condition, I appreciate. Intro: I have read and scrolled through multiple threads related to similar issues and found that despite the issues might be similar...
  19. E46 General
    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...
  20. E46 General
    Cheesy looking sludge in oil cap {HELP} My 04 bmws 325xi has been sitting for about a year. We just replaced the starter, fuel pump, disa valve, cleaned the iac, and changed breaks, rotors, and front suspension and control arm. Just changed the oil, used 0w 40 mobil 1 motor oil. When I...
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