P0223

CIRCUIT DESCRIPTION
The accelerator pedal position (APP) module provides a voltage signal that changes relative to the accelerator pedal position. There are 3 sensors which are located within the APP module that are scaled differently.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
^ The voltage is more than 4.75 volts on the APP 2.
^ The condition is met for 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The control module stores the DTC information into memory when the diagnostic runs and fails.
^ The malfunction indicator lamp (MIL) will not illuminate.
^ The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
^ The driver information center, if equipped, may display a message.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC Last Test Failed clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
^ Clear the DTC with a scan tool.

DIAGNOSTIC AIDS
There are no driveability issues associated with the APP module unless a DTC is present. The most likely causes of this DTC are faulty connections or the sensor. The least likely cause is a PCM problem.

A scan tool reads the APP 2 position in volts and should read approximately 4.5 volts with the throttle closed and with the ignition ON or at idle. The voltage should decrease at a steady rate as the throttle is moved toward wide open throttle (WOT). Also, 90 percent pedal travel is acceptable for a correct APP operation. Scan the APP 2 signal while depressing the accelerator pedal with the engine stopped and the ignition ON. The display should vary from approximately 4.5 volts when the throttle is closed to approximately 1.5 volts when the throttle is held at the WOT position. A DTC P1125 may possibly set along with DTC P0223 if the signal circuit is open.

TEST DESCRIPTION

Steps 1-4:

Steps 5-15:

The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if DTC P0223 is a hard failure or an intermittent condition.
5. This step checks for an open in the ground circuit.
8. This step checks for a short to power or a bad APP module.