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P1795 – Transmission Control Module Internal Fault

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Symptoms

  • Harsh shifting
  • Limp mode

Causes

  • TCM hardware failure
  • Power surge
  • Corrupted software

Diagnosis

  • Scan TCM
  • Check power and grounds
  • Inspect wiring

Repair

  • Replace TCM
  • Repair wiring
  • Reprogram module
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