Fuel Heater Control Module Feedback Signal Open
The feedback line from the fuel heater control module to the ECM - reporting heater status - is open.
Affected components
- Fuel heater control module
Common causes
- High likelihood: Open in feedback wiring
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.