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Home >> Chrysler >> 2025 >> Pacifica Plug-In Hybrid Select >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P2123 To P2181 >> DTC Troubleshooting >> P2123 Accelerator Pedal Position Sensor 1 Circuit High >> Possible Causes

Possible Causes

Possible Causes
5-VOLT SUPPLY 1 CIRCUIT SHORTED TO VOLTAGE
APP SENSOR SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE
APP SENSOR SIGNAL 1 CIRCUIT SHORTED TO AN APP SENSOR 5-VOLT SUPPLY CIRCUIT
ACCELERATOR PEDAL POSITION SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .