P0605 — Internal Control Module Read Only Memory (ROM) Error
| Meaning | The engine control computer has run a self-test on its permanent memory and found an internal data error. This means the computer's internal brain has lost or corrupted some of its base operating instructions. |
| Family | Powertrain (P) |
Typical symptoms
The car may not start at all
The engine might go into a limited power mode
Common causes
Low battery voltage during a previous vehicle start
Corrupted software data inside the computer
What to do
Frequently asked questions
What does code P0605 mean?
Internal Control Module Read Only Memory (ROM) Error. The engine control computer has run a self-test on its permanent memory and found an internal data error. This means the computer's internal brain has lost or corrupted some of its base operating instructions.
Can I keep driving with code P0605 active?
With caution: limp mode possible, have it checked soon
Common causes — P0605
Internal failure of the engine control computer hardware Low battery voltage during a previous vehicle start Corrupted software data inside the computer
How do you fix code P0605?
Have a technician check the vehicle battery and charging system first to rule out a simple power drop. If the power supply is stable, the engine computer itself will likely need to be tested, repaired, or replaced.
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