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ElectricalSeverity Medium: diagnose soon

P0563System Voltage High

What it means

The supply voltage is above the maximum, usually over about 16 V. Bulbs and electronics can be damaged.

Symptoms

  • Bulbs blowing, battery boiling or smelling
  • Warning lights

Common causes

  • Faulty voltage regulator (overcharging)
  • Wrong battery or charger connected
  • Poor sense wire to the regulator

What to check first

  1. Measure charging voltage at the battery
  2. Check the alternator regulator
  3. Check the battery sensor on smart charging systems
Can I drive with P0563? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P0563: questions and answers

What does P0563 mean?

P0563: System Voltage High. The supply voltage is above the maximum, usually over about 16 V. Bulbs and electronics can be damaged.

What are the symptoms of P0563?

Bulbs blowing, battery boiling or smelling. Warning lights.

What causes P0563?

Faulty voltage regulator (overcharging). Wrong battery or charger connected. Poor sense wire to the regulator.

How do you diagnose P0563?

1. Measure charging voltage at the battery 2. Check the alternator regulator 3. Check the battery sensor on smart charging systems

Can I drive with P0563?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.