What does code P0604 mean?
An internal failure is detected in the ECU RAM memory.
OBD-II Code
P0604 — Internal Control Module Random Access Memory (RAM) Error
An internal failure is detected in the ECU RAM memory.
Common symptoms
- Erratic behavior
- multiple unrelated diagnostic codes
Possible causes
- Defective ECU hardware
Initial recommendation
Replace the ECU control module.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0604 with your vehicle's actual symptoms for more complete diagnostic guidance.
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