What does code P0563 mean?

Q: What does code P0563 mean?

The engine computer sees system voltage above normal. Safe to drive? Get it checked soon. Overcharging can damage the battery and electronics.

P0563: System Voltage High

Severity: medium

What it means: The engine computer sees system voltage above normal.

Safe to drive? Get it checked soon. Overcharging can damage the battery and electronics.

Common symptoms

Battery light
Bulbs burning out
Battery smell or swelling

Likely causes, ranked

Faulty alternator voltage regulatorShop
Poor ground or sensing wireDIY

What it means: The engine computer sees system voltage above normal.

Severity: Medium. Safe to drive? Get it checked soon. Overcharging can damage the battery and electronics.

DIY or shop?

Have the charging system tested.

Before you replace parts

Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
Clear the code only after a repair, then confirm it stays off after a few drives.
Check your VIN for recalls and service bulletins.

Safety / mechanic note

Verify with a mechanic if you notice drivability changes, warning lights or overheating. A code points to a circuit or system, not always a specific part.