Fuel Composition Sensor Circuit Low Input
The flex-fuel composition sensor signal is below the minimum threshold. Likely shorted to ground, open circuit or failed sensor.
Affected components
- Flex fuel composition sensor
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Sensor failed
- Low likelihood: Connector pins corroded - high contact resistance
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.