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Re: P2127 code on 2007 Saturn Ion 2.2
Posted to Technical Discussion Forum on 8/19/2020 10 Replies

Eric, "During normal operations the APP sensor modifies the 5 volt Reference and sends the modified voltage back to the PCM on the APP Sensor Signal Return wire".

I don't see the 5 volt reference modified or the signal modified. As I understand this circuit ... Login to read more.

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