P0238

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 Boost Pressure is greater than or equal to 4.8 volts (202 kPa).
^ The engine speed is less than 3506 RPM.

ACTION TAKEN WHEN THE DTC SETS
There is no turbo boost.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM will turn the Malfunction Indicator Lamp (MIL) off after three consecutive trips without a fault condition.
^ 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) of that same ignition cycle).
^ Use of a Scan Tool will clear the DTC codes.

DIAGNOSTIC AIDS
Very little boost can be attained by revving the engine in neutral.
An intermittent can be caused by the following:
^ Poor connections.
^ A rubbed through wire insulation.
^ A broken wire inside of the insulation.

TEST DESCRIPTION
The number(s) below refer to the Step number(s) on the Diagnostic Table.
3. This Step will make sure the PCM is responding to a low signal voltage. This will indicate that the PCM is OK.
9. If the Scan Tool display is still less than or equal to 9 kPa by disconnecting the PCM, the short to voltage is in the wiring.
10. If the voltmeter value stays the same by disconnecting the PCM, the short to voltage is in the wiring.