OBD codes / P0606
P0606
SeriousECM/PCM Processor Fault
Address promptly — can worsen or affect drivability.
Likely causes
- internal PCM failure
- power/ground fault
Common fixes
- check PCM power & grounds
- reflash or replace PCM
Seeing P0606 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0606 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.