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by RickHaleParker
07 Aug 2020, 01:03
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Re: Lean Code P0171, but LTFT is -25

I'm getting a P0171 code but my LTFT reads -25. I've pulled the spark plugs from the car to check and they were black and smelled like fuel. I'm just not sure how I get a lean code, but I'm running extremely rich. Leak in the exhaust system. 1. Air gets sucked into the exhaust. 2. O2 sensor detects...