P0600 – Serial Communication Link Malfunction

Description

The ECM detects a failure in the serial communication link between control modules.

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Symptoms

  • No start
  • Harsh shifting
  • Multiple warning lights
  • Reduced power

Causes

  • CAN bus wiring fault
  • Loose connectors
  • ECM/TCM failure

Diagnosis

  • Scan for U-codes
  • Inspect CAN wiring
  • Check module power/grounds

Repair

  • Repair wiring
  • Clean connectors
  • Replace faulty module

Related Problems

Related Fault Codes