Alternative Fuel Tank Shutoff Valve E Control Circuit Performance/Stuck Off
The control circuit of alternative fuel tank shutoff valve E reports a control circuit performance/stuck off condition. Tank isolation cannot be commanded as expected on multi-tank CNG/LPG systems.
Affected components
- Alt fuel tank shutoff valve e
- Wiring harness
- Afcm
Common causes
- High likelihood: Shutoff valve mechanically stuck closed
- Medium likelihood: Coil force degraded with age
- Low likelihood: Carbon or debris buildup preventing free movement
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.