Alternative Fuel Tank B Pressure Sensor Circuit High
Voltage on the pressure sensor signal line of alternative fuel tank B is above the expected window. Wire shorted to B+ or sensor open.
Affected components
- Alt fuel tank b pressure sensor
- Wiring harness
- Afcm
Common causes
- High likelihood: Signal wire shorted to B+
- Medium likelihood: Open pressure sensor
- Low likelihood: Connector pins corroded - high contact resistance
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.