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lean fuel
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  1. E46 General
    Ok so still fighting my ‘01 330i on the dreaded p0171 and p0174. It seems as if I have gotten it down to something with the ac. Call me crazy. I haven’t read anything in any other thread about this. But it only throws lean codes when I’m running the ac system. Any guesses?
  2. E46 General
    Hi! Failed smog due to high NOX, and scanner detected P1092 and P0313, which "Pre Catalyst Fuel Trim System too Lean Bank 2" and "Misfire low fuel level". I have read many postings here as possible, and my (prematured) interpretations would be : For misfire, I guessed it is due to low...
  3. E46 General
    Ok so I have been having this problem since I bought the car. It's intermittent, i randomly get the P0174 and I believe 0171 lean mixture both banks along with missfire on low fuel. It's only when the car is driven for a few miles at low rpm. However if I drive the car spirited the cel goes...
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