P00BE: Mass or Volume Air Flow B Circuit Range/Performance - Air Flow Too Low

What does P00BE mean?

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. P00BE concerns air flow meter B, i.e. a second meter, for example in the second intake path of a V engine. 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.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine light on
• Loss of power
• Lean mixture codes possible

Common causes

• High Air leak behind the meter or charge-air leak
• Medium Air flow meter dirty
• Medium Air filter or intake restricted
• Low Wiring or connector faulty

Likelihood is a general estimate across vehicles; your make and model may differ.