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P0563 — System Voltage High

Medium Severity  ·  Electrical

OBD-II code P0563 means your vehicle's ECU detected: System Voltage High. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.
Typical Repair Cost
$100–$600
Parts + labor, national average
Severity
Medium
Schedule repair soon
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Common Causes of P0563

  • Overcharging alternator
  • Failed voltage regulator
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How to Fix Code P0563

1
Test alternator output
2
Replace voltage regulator or alternator

FAQ — Code P0563

What does OBD-II code P0563 mean?
P0563 means your vehicle's onboard computer detected: System Voltage High. This is a medium-severity code in the Electrical category.
How much does it cost to fix code P0563?
Typical repair cost for P0563 is $100–$600 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.
Can I drive my car with code P0563?
Code P0563 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.
What are the most common causes of P0563?
The most common causes are: Overcharging alternator, Failed voltage regulator. Always start with the cheapest diagnosis step before replacing parts.
Will code P0563 clear itself?
Code P0563 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0563 showing on your car?

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.