P0225

Diagnostic Chart:

Wiring Diagram:

Circuit Description
The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to the accelerator pedal position. There are three sensors which are located within the APP module that are scaled differently. This is a type D DTC.

Conditions for Setting the DTC

^ The reference voltage on the APP 3 is below 4.8 volts.
^ The condition was met for 2 seconds.

Action Taken When the DTC Sets
If a DTC PO225 is present, the PCM will turn the Service Throttle Soon lamp ON and limit the power. Multiple APP DTCs will be present.

Conditions for Clearing the MIL/DTC

^ A History DTC will clear after forty consecutive warm-up cycles during which the diagnostic does not fail (the coolant temperature has risen 5°C (40 F) from the start up coolant temperature and the engine coolant temperature exceeds 71°C (160°F) during that same ignition cycle.
^ Use of a Scan tool will clear the DTC codes.

Diagnostic Aids
An intermittent may be caused by the following:

^ Poor connections.
^ A rubbed through wire insulation.
^ A broken wire inside of the insulation.

All of the 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 check all 5 volt reference circuits.