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Home › Jeep › 2012 › Wrangler Sahara, Automatic Trans › Repair and Diagnosis › Transmission › Automatic Trans › Transmission Control Module (TCM) - Electrical Diagnostics › DTC Troubleshooting › P1637-TCM Internal-EEPROM Performance › Set Condition:

Set Condition:

If the TCM indicates that there is an internal error with the controllers Random Access Memory.

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