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International Automotive Technicians Network
Re: P0171
Posted to Technical Discussion Forum on 1/5/2019 1 Reply

Being fuel trims are different between banks, stay the same through the load/rpm range, and that this is a speed-density system, I would think it’s an injector issue or possible air/fuel ratio sensor fault.

As a theory discussion, I would think that most air... Login to read more.

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