What usually causes it
- A failing alternator (the part that charges the battery) or its voltage regulator, which overcharges
- A loose or rusty battery connection
- A bad ground wire
- A fault in the engine computer, which is not common
P0563Starts at: Get it checked this week
Electrical system voltage is high
The computer checks the voltage of the car's electrical system, which the battery and alternator supply. The voltage is higher than it should be, which can harm the battery and other parts.
Check this first
Look at the battery cables for loose, greasy or crusty buildup. Many auto parts stores test the battery and alternator for free.
What to watch for
- The battery light on the dash
- Headlights that look very bright, or bulbs that keep burning out
- A rotten egg smell from the battery, or a swollen battery
Can I keep driving?
We rate P0563 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0563
What does P0563 mean?
Electrical system voltage is high. The computer checks the voltage of the car's electrical system, which the battery and alternator supply. The voltage is higher than it should be, which can harm the battery and other parts.
Can I keep driving with P0563?
We rate P0563 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0563?
The most common causes, in order: A failing alternator (the part that charges the battery) or its voltage regulator, which overcharges; A loose or rusty battery connection; A bad ground wire; A fault in the engine computer, which is not common.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.