P0605 Internal Control Module Read Only Memory (ROM) Error

Powertrain Severity: High Generic OBD-II

The engine computer detected a ROM fault.

Common causes

  • Internal module fault
  • Failed programming

Symptoms

  • Check engine light
  • Limp mode or no start

What to check

  1. Reprogram the module
  2. Replace if the fault returns

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0605, follow the service information for that make and model.

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