Fuel Injector Group A Supply Voltage Circuit Low
The supply voltage measured at injector group A is below the calibrated threshold. Either the supply is shorted to ground or the source voltage has collapsed during cranking or load.
Affected components
- Fuel injector
- Injector supply relay
- Injector wiring
Common causes
- High likelihood: Supply wire shorted to ground
- Medium likelihood: Weak battery, low cranking voltage
- 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
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
Related codes
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.