Charging System Voltage High
The ECU detects a battery voltage above the regulated upper limit. The voltage regulator is not limiting alternator output, risking damage to electronic modules and battery overcharge.
Affected components
- Alternator
- Voltage regulator
- Battery
Common causes
- High likelihood: Faulty voltage regulator
- Medium likelihood: Poor alternator ground
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.