Alternative Fuel Tank Select Valve A Control Circuit High
The control circuit of alternative fuel tank select valve A reports a control circuit high condition. Tank selection on multi-tank CNG/LPG systems cannot be commanded reliably.
Affected components
- Alt fuel tank select valve a
- Wiring harness
- Afcm
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open valve coil
- 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.