P0605
Internal Control Module Read Only Memory (ROM) Error
P0605 is an OBD-II diagnostic trouble code meaning: Internal Control Module Read Only Memory (ROM) Error. Common causes: physical damage to the rom chip in the ecu, incorrect or interrupted ecu reprogramming. Estimated repair cost: $33–444.
Symptoms
- The Check Engine light comes on
- Emergency engine operation
- Unstable engine operation or starting failure
- Incorrect dashboard readings
- There may be malfunctions in the transmission and other systems
Causes
- Physical damage to the ROM chip in the ECU
- Incorrect or interrupted ECU reprogramming
- Firmware damage due to power surge
- Installing an incompatible software version
- ECU manufacturing defect
How to Fix
- Read all existing error codes and record data
- Check the ECU supply voltage and battery condition
- Try reprogramming the ECU with the original firmware
- If flashing is not possible, send the ECU to a specialized service
- If a hardware defect is confirmed, the ECU is replaced with subsequent programming for the vehicle’s VIN
Related codes
Error P0605 by Vehicle Brand
FAQ
What does the P0605 code mean?
P0605 is an OBD-II diagnostic trouble code that indicates: Internal Control Module Read Only Memory (ROM) Error
What causes a P0605 error code?
The most common causes of P0605 include: Physical damage to the ROM chip in the ECU; Incorrect or interrupted ECU reprogramming; Firmware damage due to power surge; Installing an incompatible software version.
How do I fix a P0605 diagnostic trouble code?
To fix P0605: Read all existing error codes and record data. Check the ECU supply voltage and battery condition. Try reprogramming the ECU with the original firmware. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0605?
Do not drive — repair immediately
How much does it cost to fix P0605?
The estimated repair cost for P0605 is $33–444. Actual cost depends on your vehicle, location, and labor rates.
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