Exhaust Aftertreatment Fuel Injector A Circuit High
Voltage on the 7th injector control line is above the expected window. Typical causes are a short to battery or an open solenoid coil.
Affected components
- Hc dosing injector
- Injector solenoid
- Wiring harness
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open injector coil
- 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
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.