Engine Error
P0563
System Voltage High
Severity
High
Symptoms
Battery light on, headlights very bright and burning out, sulfur smell from battery
Common Causes
- Defective alternator voltage regulator
- Overcharging alternator
- Poor ground connection to battery
- PCM failure
How to Fix
- 1 Replace alternator (regulator is often internal)
- 2 Clean main engine and chassis grounds
- 3 Test battery for overcharge damage and replace if needed
- 4 Test PCM
Estimated Repair Cost
USD
$100
–
$600
Alternator replacement: $300 - $600; Battery: $150 - $250