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These are the archives for the term P0171.
Volvo S70: Code P0171 and White SmokeOn startup, regardless of the weather, the S70 will let out a puff of white smoke. The Check Engine light is on and throwing a P0171 code. O2 sensors have been replaced and the code continues to pop up. I noticed today while sitting at the store idling that it would idle at 900 rpm’s. […]