P0563Severity: Medium
P0563 – System Voltage High
The vehicle's electrical system voltage is higher than expected.
What it means
The ECU sees supply voltage that's too high. It usually stems from the charging system (alternator/regulator) and can damage electronics.
Symptoms
- Flickering gauges
- Shorter bulb life
- Check-engine light
Common causes
- Faulty voltage regulator
- Alternator issue
- Battery/cable connection issue
- Ground fault
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Frequently asked questions
What does trouble code P0563 mean?
P0563 – System Voltage High. The ECU sees supply voltage that's too high. It usually stems from the charging system (alternator/regulator) and can damage electronics.
Can I drive with a P0563 code?
You can usually drive short distances, but it's best to have it checked before it gets worse.