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P0123-Accelerator Pedal Position Sensor Signal 1 Circuit High: Notes

Fig 1: Accelerator Pedal Position Sensor Circuit Schematic
GC0034105Courtesy of CHRYSLER LLC
  1. When Monitored  : With the ignition on and no other Accelerator Pedal Position (APP) Sensor 1 DTCs present.
  2. Set Condition  : When APP Sensor Signal 1 voltage is too high. Engine will only idle if the brake pedal is pressed or has failed. Acceleration rate and engine output are limited.
Possible Causes 
ACCELERATOR PEDAL POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO VOLTAGE
ACCELERATOR PEDAL POSITION SENSOR SIGNAL 1 SHORT TO APP SENSOR 5-VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
ACCELERATOR PEDAL POSITION SENSOR
POWERTRAIN CONTROL MODULE

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .