bugdybogdel

Hi all.

Few days ago my light management came on and have the "mass or volume air flow circuit B high and low"
THe car runs fine. I cleaned both of the sensors but still comes up. With the fault.
I need some help as Mercedes in the UK and Germany don't have the parts.🤦🤦🤦. I've been looking only to try to find a solution but nothing for sure.

Regards
Code P010A,D and D

CaliBenzDriver

What chassis specifics?

Cleaning MAF was not enough
Sounds like a new/used spare is coming your way. Perhaps your ECU circuit is disrupted by nearby chaos.

I am sure you double checked the connector already, right?

Eventually read the sensor data to confirm activity or lack there of on your circuit B.

bugdybogdel

My engine is OM642, year 2015.

I on the lookout for a new one/spare but can barely find it. The part A6420901742 you can barely find it.

How can I check if the ECU is the problem? My tester is not giving me any other errors?

The connectors seem to be alright. Nothing dodgy there.

At idle it shows 7g/s at 70mph as per the pic

bugdybogdel

My question is how vome the car runs and drives perfectly fine?

Rickman30

Pending means computer caught a glitch in the circuit. Stored means no current fault but an intermittent fault was observed, Current means a hard fault. Car runs fine because no current faults at time of driving.

It may be a damaged wire between Sensor an Computer, or cleaning did the trick. Normally a failed MAF, will set a hard fault. They are not known for intermittent like this. If it was running bad, to verify the sensor failure you can unplug it and see if engine smooths out, it will run unplugged, the computer should default to Speed Density program when MAF is unplugged or the circuit has an open.

Clear codes and see if it comes back.

bugdybogdel

Okay did not know this. Thanks for the info.
cleaning it did not work. The error codes still appear in as pending and when I unplugged them one by one (first left and right one after the car kept running smoothly.
On the scanner it appeared an error with the intake I don't remember. I can reproduce the fault and sent it across.

If the car still runs smoothly does that mean its not the sensor and its the something along the circuit?

bugdybogdel

Forgot to mention after clearing the code the same error appears once I start and stop the car.

Rickman30

If it keeps throwing a pending code, more testing is required.

This is where a tech would test wiring integrity, then use a lab scope on the MAF to watch for any abnormalities and verify proper air flow vs barometric pressure and fuel trims. He would check for vacuum and exhaust leaks, overall integrity of fuel/air systems, etc...

I would not just throw parts at it, could make things worse by guessing.