P00BCMass or Volume Air Flow A Circuit Range/Performance - Air Flow Too Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The control module compares the air mass measured by the air flow meter with the air mass it expects from a model, for example from manifold pressure, boost pressure and throttle position. These codes report the deviation with its direction: "too low" means the meter measures less air than expected, "too high" more. Regulations allow manufacturers to use one code for both directions or separate codes, as here. P00BC concerns air flow meter A. Typical causes are air entering behind the meter, a charge-air leak, a dirty meter or a restricted intake. No manufacturer description naming this exact code was found; the explanation follows its documented counterpart.
- What you may notice
- Check engine light on
- Loss of power
- Lean mixture codes possible
- Likely causes
- LikelyAir leak behind the meter or charge-air leak
- PossibleAir flow meter dirty
- PossibleAir filter or intake restricted
- RareWiring or connector faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.