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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (2.0L - DTCS P2122 To P2173) >> DTC Troubleshooting >> P2123 Accelerator Pedal Position Sensor 1 Circuit High >> Possible Causes

Possible Causes

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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:  2.0L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .