Quote:
Originally Posted by TjswiggY
they will i just got mine back and it runs worse than before and now my traction control wont even kick in. my vin is in the range of 602086. i have 2800 on mine. im taking it to a tuner shop in town tomorrow that has a subaru guy. the dealer tried to say that it was my cold air intake that was making it that way and the code was for running lean on the 1st cylinder and my ECU was trying to compensate for it.... if it was my intake wouldnt it be running lean on all 4? they cleared the code but with the way it runs/drives i will pop up on my engine will go.... hopefully its the engine and then they can give me a whole new car.... im starting to have some regrets.
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It's not the engine P0171 is system is too lean bank 1, not just cylinder 1. Bank 1 is the side of the engine that has cylinder #1-4. On 4 cyl we only have bank 1. V6/V8 have bank1 bank2. This means the O2 sensor in your exhaust is detecting a lean A/F mixture that your ECU can't compensate for.
Common causes include:
- Intake or vacuum leaks
- Clogged or faulty Mass Air Flow sensor (MAF)
- Faulty PCV valve
- Exhaust leaks
- Faulty oxygen sensor
- Improperly installed aftermarket cold intake