Drive with caution — fix soon.
P0563 means your car's computer detected that the system voltage is higher than the normal operating range. This is usually caused by a faulty voltage regulator in the alternator that's overcharging, or by a wiring problem. Consistently high voltage can damage the battery and electronic components, so it shouldn't be ignored.
$150 – $600
Varies by vehicle and root cause.
You can usually drive a short distance, but don't ignore this one. The high voltage can damage your battery and electronics over time, so it's worth getting checked soon. If you notice swelling, overheating, or erratic electrical behavior, have it looked at right away.
Repairs typically range from $150 to $600. A wiring or ground fix is on the lower end, while replacing the alternator or voltage regulator costs more. A diagnosis will identify whether it's a charging part or a wiring issue driving the high voltage.
It's a moderate concern that can become serious if ignored. Sustained high voltage can damage the battery, computer, and other electronics, leading to costly repairs. Catching it early usually means a simpler, less expensive fix.
It means the charging system is sending more voltage than the car's electronics are designed to handle, usually because the alternator's voltage regulator is overcharging. The computer flags this to protect sensitive electrical parts from damage.