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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P1635: 5-Volt Reference "A" Circuit >> Description
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DTC P1635: 5-Volt Reference "A" Circuit: Description

PCM monitors 5-volt reference "A" circuit to TP, MAP and EGR position sensors.