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Home >> Dodge and Ram >> 2013 >> Durango R/T, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 112 (Transmission Control Module (TCM) - Nag1 Automatic Transmission) >> Diagnosis And Testing >> P1637-TCM Internal-EEPROM Performance >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
TRANSMISSION CONTROL MODULE

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  .