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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 3.6L - DTCS P2116 To P2457 >> DTC Troubleshooting >> P2457-Exhaust Gas RECIRCULATION Cooling System Performance >> Possible Causes

Possible Causes

Possible Causes
ENGINE COOLANT LOW
EGR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
SENSOR GROUND CIRCUIT OPEN/HIGH RESISTANCE
EGR COOLER ASSEMBLY RESTRICTED
INTERNAL OR EXTERNAL CRACK IN THE EGR COOLER ASSEMBLY

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

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