The control module detected an internal memory checksum error — an internal ECM/PCM fault.
SYMPTOMS
- Check-engine light
- Drivability issues
- Possible no-start
LIKELY CAUSES
- Corrupted module memory
- Failed ECM/PCM hardware
- Power/ground fault during programming
DIAGNOSIS STEPS
- Verify module power and grounds
- Reflash/recode if supported
- Replace and code the module if confirmed
RELATED PARTS
- Engine control module (DME)