Internal Control Module EEPROM Error
The ECU's EEPROM (persistent calibration storage) reports a check-sum or write error. Calibration values may be corrupted - the ECU runs on safe defaults until repair.
Affected components
- Ecu eeprom
Common causes
- High likelihood: EEPROM check-sum failure
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.