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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 44 (2.0L - DTCS P0401 To P04C1) >> DTC Troubleshooting >> P0406 EGR Position Sensor Circuit High >> Possible Causes

Possible Causes

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Possible Causes
5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED
EGR VALVE POSITION SIGNAL CIRCUIT SHORTED TO VOLTAGE
EGR VALVE POSITION SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
SENSOR GROUND CIRCUIT OPEN/HIGH RESISTANCE
EGR VALVE ASSEMBLY
POWERTRAIN CONTROL MODULE

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