Ion Sense Module Supply Voltage High
Supply voltage on the ion sense module is above the expected window. Charging system overvoltage or upstream regulator fault.
Affected components
- Ion sense module
- Wiring harness
Common causes
- High likelihood: Alternator regulator drift - overvoltage
- Medium likelihood: Supply wire shorted to B+
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.