OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2BB0?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAlt fuel injectors partially clogged
- PossibleTank-fill calibration drifted
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Alt Fuel Injectors, Alt Fuel Tank, Afcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.