Error code

OBD2 P0563

OBD2P0563
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

System Voltage High.

Severity

highDrive cautiously with frequent checks; may cause electrical system damage.

Summary

P0563 indicates a high system voltage issue related to either the battery or alternator.

Symptoms

  • Battery may partially or fully discharge over time
  • Frequent or unpredictable stalling due to low battery power
  • Erratic shifting of automatic transmission
  • Damage to electrical components from excessive voltage

Common Causes

  • Defective alternator
  • Faulty battery
  • Corroded wiring and connectors
  • High parasitic current drain on the battery
  • Poor installation of aftermarket accessories

Diagnosis

  1. Check and test the battery for proper function
  2. Inspect wiring and connectors for corrosion or damage
  3. Test alternator output using a multimeter while engine is running

Fixes

  • Replace defective alternator or battery

FAQ

Can I drive with P0563?

Drive cautiously and check the electrical system frequently. The issue can cause further damage to your vehicle.

What causes high voltage in my car's electrical system?

High voltage is often caused by a faulty alternator or battery, damaged wiring, or excessive current draw from accessories.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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