P0563: System Voltage High
What this check-engine code means in plain English, what usually causes it, and what a fix typically costs.
What P0563 means
This code means the powertrain control module (PCM) has detected that the vehicle's electrical system voltage is consistently above the normal operating range (typically above 16 volts). Excessive voltage can damage sensitive electronic components, the battery, and other electrical systems throughout the vehicle.
What causes P0563?
Is P0563 safe to drive?
You can drive briefly to a repair facility, but prolonged driving with high system voltage risks damaging the battery, PCM, and other electronic modules. Have the charging system inspected immediately to prevent costly electrical component failures.
P0563 repair cost
Industry-average estimates. Cost depends on whether you need just a voltage regulator, a complete alternator replacement, or PCM/wiring repairs.
Which one is it for your car?
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