Code
P0563
Charging
System voltage high
System voltage is above the expected range, risking battery damage.
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Most likely causes
- Faulty voltage regulator
- Overcharging alternator
- Bad ground
Symptoms you may notice
- Battery boils
- Lights brighter than normal
- Check engine light
Checks to run
- Measure charging voltage
- Test the regulator
- Check grounds
Tools you may need
Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.