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Re: P0101 on 03 Chevy Van w/ 5.3
Posted to Technical Discussion Forum on 1/3/2008 6 Replies

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Good evening David. Did both codes return? What kind of service info do you have? The P0101 is a rationality code, the PCM uses inputs from the IAT,ECT and MAP sensors along with engine rpm to calcul... Login to read more.

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