What does fault code ECM-P010B00 mean?

Diagnostic fault code details for ECM-P010B00 (Volvo S80 (2007–), Volvo S80 (2007–), Volvo V70 (2008–)). Repair service at OBD Tuning.

VOLVO

ECM-P010B00 - Mass or Volume Air Flow B Circuit Range/Performance. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

5 models

S80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)

Show models by year and engine (8)

What does this fault code mean?

The ECM monitors the B-side mass air flow sensor signal. The code is stored when the signal is too high, too low or otherwise incorrect. Here the signal lies outside the expected range, and the result can be that engine torque is limited.

Possible causes

Poor contact, high resistance or corrosion in the connections
Break in the signal wire
Signal wire shorted to supply voltage
Signal wire shorted to ground

What you can do

1Read and note the code, clear it and road test to see whether it returns
2Check that the connectors at the B-side mass air flow sensor are fully engaged and free from oxidation and play
3With a multimeter, check that the signal wire has no break and is not shorted to ground or supply voltage
4If you have diagnostic equipment, read the B-side sensor value in live data at idle and check that it follows engine load
5If the fault remains, have a workshop check the B-side mass air flow sensor

Symptoms you may notice3

Engine warning lamp (check engine) lit or behaving abnormally
The car lacks power and runs poorly
Text message in the display

What the fault can affect2

Engine torque may be limited
A calculated air mass value is used instead of the measured value

General guidance for car owners. Diagnosis on the car can point to a different cause.