Alternative Fuel Tank Empty
The AFCM detects that the alternative fuel tank is empty. Bi-fuel vehicles may switch to gasoline operation; mono-fuel vehicles cannot continue without refuel.
Affected components
- Alt fuel tank
- Alt fuel level sensor
Common causes
- High likelihood: Tank actually empty - refuel required
- Medium likelihood: Level sensor reads empty incorrectly
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.