Excessive Time to Enter Alternative Fuel Control
On bi-fuel vehicles, the AFCM cannot transition into alternative fuel control mode within the calibrated time window. Tank pressure low, vaporizer cold, or fuel quality limits the change-over.
Affected components
- Afcm
- Alt fuel tank
- Alt fuel vaporizer
Common causes
- High likelihood: Alt fuel tank pressure low
- Medium likelihood: Vaporizer not yet at operating temperature
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.