P0220

Circuit Description
The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to Accelerator Pedal Position. There are three sensors located within the APP module that are scaled differently.

Conditions for Running the DTC
The ignition switch is in the ON position.

Conditions for Setting the DTC
^ The reference voltage on APP 2 is less than 4.8 volts.
^ The condition is met for 2 seconds.

Action Taken When the DTC Sets
^ The service throttle soon lamp will not illuminate when one APP DTC sets. The PCM will only illuminate the service throttle soon lamp when multiple APP DTCs set.
^ The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Failure Records.

Conditions for Clearing the MIL/DTC
^ The PCM will turn the MIL off after three consecutive trips without a fault condition.
^ A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures
^ The use of a scan tool.

Diagnostic Aids
There are no driveability issues associated with the APP module unless a DTC is present. The most likely cause of this DTC are poor connections or the sensor itself. The least likely is a PCM problem. All 5 volt reference circuits must be checked for a proper reference voltage. Voltmeter accuracy is important.

Test Description
The number(s) below refer to the step number(s) on the Diagnostic Table.
2. This step will determine if there is a good voltage reference.