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Home >> Dodge and Ram >> 2018 >> Charger Pursuit, 5.7L Eng VIN T, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Transmission Control Module (TCM) - Electrical Diagnostics - Nag1 Automatic Transmission) >> DTC Troubleshooting >> P0657-Control Supply Voltage Circuit >> Possible Causes

Possible Causes

Possible Causes
(T78) SOLENOID SUPPLY VOLTAGE CIRCUIT OPEN
(T78) SOLENOID SUPPLY VOLTAGE CIRCUIT SHORT TO GROUND
(T78) SOLENOID SUPPLY VOLTAGE CIRCUIT SHORT TO VOLTAGE
(T78) SOLENOID SUPPLY VOLTAGE CIRCUIT SHORT TO ANOTHER CIRCUIT
TRANSMISSION CONTROL MODULE

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  NAG1 TCM - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   . 

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