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Home >> Jeep >> 2018 >> Wrangler Unlimited Moab >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control Module (TCM) - DTCS P0219-00 To P1D90-00 >> DTC Troubleshooting >> P0634-Pcm/ECM/TCM Internal Temperature Too High >> Possible Causes

Possible Causes

Possible Causes
INCORRECT TRANSMISSION FLUID LEVEL
CASE VENT PLUGGED OR DAMAGED
TRANSMISSION COOLER AIRFLOW IS COMPROMISED
RESTRICTION IN TRANSMISSION COOLING SYSTEM
TORQUE CONVERTER
TRANSMISSION CONTROL MODULE (TCM)

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