Code result
P0563
System Voltage High
Moderate severity
What it means
Battery / charging system voltage seen by the ECU exceeds the upper threshold (typically around 16 V). Caused by a failing voltage regulator inside the alternator. Sustained over-voltage can damage other electronics.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Voltage regulator failed
highOne of the most commonly reported causes for this code — check this first.
Alternator overcharging
mediumA plausible cause — test and verify before replacing parts.
Related help
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