Fuel Injector Group B Supply Sense Circuit High
Voltage on the supply sense circuit of fuel injector group B is above the expected window. Indicates overvoltage or wire shorted to B+.
Affected components
- Fuel injector group b
- Wiring harness
- Ecm
Common causes
- High likelihood: Alternator regulator drift - overvoltage
- Medium likelihood: Sense wire shorted to B+
- Low likelihood: Connector pins corroded - high contact resistance
Possible symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
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.