Fuel Injector Group B Supply Sense Circuit Low
Voltage on the supply sense circuit of fuel injector group B is below the expected window. Indicates collapsed supply or short to ground.
Affected components
- Fuel injector group b
- Wiring harness
- Ecm
Common causes
- High likelihood: Supply rail collapsed under load
- Medium likelihood: Sense wire shorted to ground
- 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.