P0223
DTC P0223 APP Sensor2 Circuit High Voltage
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 diffrently.
Conditions for Running the DTC
The ignition switch in the on position.
Conditions for Setting the DTC
^ The voltage is greater than 4.75 volts on the APP 2.
^ The condition was 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 Record.
Conditions for Clearing the MIL/DTC
^ A History DTC will clear after forty consecutive warm-up cycles, if this or any other eemissionrelated diagnostic does not report any failures.
^ Use of a scan tool will clear the DTC codes.
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 PGM problem. A scan tool reads the APP 2 position in volts and should read about 4.5 volts with the throttle closed and the ignition ON or at idle. The voltage should decrease at steady rate as the throttle is moved toward WOT. Also, 90% 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 about 4.5 volts when the throttle is closed to about 1.5 volts when the throttle is held at Wide Open Throttle (WOT) position. A P1125 may possibly set along with a P0223 if the signal circuit is open.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table
2. This step determines if P0223 is a hard failure or an intermiffent condition.
5. This step will check for an open in the ground circuit.
8. This step will check for a short to power or a bad APP mode.
