Alternative Fuel Disable Signal Circuit
The feedback signal that confirms the alt-fuel disable command was carried out is missing or out of range. The fuel system cannot verify that the gas circuit is shut.
Affected components
- Alt fuel control module
- Feedback sensor
- Wiring harness
Common causes
- High likelihood: Open feedback wire between relay and control module
- Medium likelihood: Feedback contact in the disable relay corroded or stuck
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.