P1317 – TCM/ECM Communication Fault (Nissan)

Description

The ECM detected a communication fault with the transmission control module.

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Symptoms

  • Limp mode
  • Harsh shifting

Causes

  • CAN wiring fault
  • TCM issue
  • ECM error

Diagnosis

  • Check CAN wiring
  • Inspect connectors
  • Scan TCM data

Repair

  • Repair wiring
  • Replace TCM
  • Repair ECM