Alternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic
The pressure sensor signal of alternative fuel tank C drops out or jumps intermittently. Loose connector or noisy ground.
Affected components
- Alt fuel tank c pressure sensor
- Wiring harness
- Afcm
Common causes
- High likelihood: Sensor connector not seated
- Medium likelihood: Noisy ground reference
- Low likelihood: Connector with intermittent contact under vibration
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- 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.