Monitor Description

When either of the output voltages of VPA or VPA2 deviates from the standard range, or the difference between the output voltages of the 2 sensor circuits is less than the threshold, the ECM determines that there is a malfunction in the APP sensor. The ECM then illuminates the MIL and sets a DTC. Example:

When the output voltage of VPA drops to below 0.4 V for more than 0.5 seconds when the accelerator pedal is fully depressed, DTC P2122 is set.

If the malfunction is not repaired successfully, a DTC is set 2 seconds after the engine is next started. MONITOR STRATEGY

Related DTCs

P2120: Accelerator Pedal Position (APP) sensor 1 range check (fluctuating)

P2122: APP sensor 1 range check (low voltage)

P2123: APP sensor 1 range check (high voltage)

P2125: APP sensor 2 range check (fluctuating)

P2127: APP sensor 2 range check (low voltage)

P2128: APP sensor 2 range check (high voltage)

P2138: APP sensor range check (correlation)

Required Sensors/Components (Main)

APP sensor

Required Sensors/Components (Related)


Frequency of Operation



0.5 seconds: P2120, P2122, P2125 and P2127 2.0 seconds: P2123, P2128 and P2138

MIL Operation


Sequence of Operation


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