P2BB0 — Alternative Fuel Consumption Too Low
The AFCM detects that alternative fuel consumption falls below the expected value for the active operating mode. Indicates injector clogging, leaks before injectors, or incorrect tank-fill correction.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Alt fuel injectors
- Alt fuel tank
- Afcm
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Alt fuel injectors partially clogged
- Tank-fill calibration drifted
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.