Severity: Moderate
Drivable, but it can cause more damage or poor economy. Get it checked within days.
What P0563 means
System voltage is above normal; overcharging can damage modules and the battery.
Symptoms
- Bulbs burning out
- Battery smells or swells
Common causes
Most likely first
- 1Failed voltage regulator / alternator
- 2Poor sense-wire connection
How we diagnose it
- Measure charging voltage at the battery
- Check alternator control circuit
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.