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Home >> Pontiac >> 2007 >> Vibe Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0452 To DTC P2138 >> DTC P2121 >> Diagnostic Aids

Diagnostic Aids

On a good APP sensor 1 the scan tool will typically display a voltage of 0.75-0.80 volts at idle. APP sensor 2 voltage will be 1.60-1.65 volts at idle.

An intermittent malfunction may be caused by fault in the APP sensor electrical circuits. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .

Repair any electrical circuit faults that were found. Refer to Wiring Repairs .

The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.

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