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Home >> Jeep >> 2013 >> Wrangler Rubicon, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 ((Transmission Control Module (TCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> P1638-TCM Internal-Can 1 Ram Performance >> Possible Causes

Possible Causes

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Possible Causes
TRANSMISSION CONTROL MODULE (TCM)

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