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Home >> Jeep >> 2009 >> Commander Limited, 4.7 P, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Transmission Control Module (TCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P0605-Internal Control Module ROM >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The Transmission Control Module (TCM) performs various internal tests to verify proper controller operation. If the TCM detects an error with the controllers Read Only Memory (ROM), the controller will enter Limp-in mode and illuminate the MIL.

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