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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 50 (2.0L - DTCS P1E28 To P2123) >> DTC Troubleshooting >> P1E28 EGR 1 High Side Control Circuit High >> Possible Causes

Possible Causes

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Possible Causes
EGR VALVE MOTOR (+) CIRCUIT SHORTED TO BATTERY VOLTAGE
EGR VALVE MOTOR (+) CIRCUIT SHORTED TO THE EGR VALVE MOTOR (-) CIRCUIT
EGR VALVE ASSEMBLY
POWERTRAIN CONTROL MODULE

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