OBD codes / P0563
P0563
ModerateSystem Voltage High
Get it looked at soon to avoid further wear.
Likely causes
- overcharging alternator
- faulty voltage regulator
- wiring fault
Common fixes
- test the alternator/voltage regulator
- inspect charging system wiring
Seeing P0563 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0563 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.