Alternative Fuel Tank Shutoff Valve B Control Circuit/Open
The control circuit of alternative fuel tank shutoff valve B reports a control circuit/open condition. Tank isolation cannot be commanded as expected on multi-tank CNG/LPG systems.
Affected components
- Alt fuel tank shutoff valve b
- Wiring harness
- Afcm
Common causes
- High likelihood: Open in valve control wire
- Medium likelihood: Open valve coil
- Low likelihood: Pin pushed back out of connector body
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.