Alternative Fuel Tank B Level Sensor Circuit Intermittent/Erratic
The level sensor signal of alternative fuel tank B drops out or jumps intermittently. Loose connector or vibration-sensitive contact.
Affected components
- Alt fuel tank b level 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
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.