MAF sensor algorithm fault

[Graham1991]

Hello,

I'm absolutely pulling my hair out with my current problem. I have a 2013 Sprinter (2006 onwards model) with a flashing engine management light that will not clear. This occurred 500 miles from home on holiday. I've had a local specialist do diagnostics, the local MB garage (Arnold Clark) will not look at it being a van and my nearest MB garage is a 4 hour round trip!

Fault showing on diagnostics: P010106 Mass Air Flow sensor Algorithm Fault.

Symptoms: None really. It's in limp mode but starts perfect and runs fine although smells a little rich on start up.

What I have done: I have checked all inlet hoses, intercooler, manifold and all seem fine. DPF has been removed and fully cleaned, EGR has been cleaned, MAF sensor has been replaced, MAP sensor has been replaced, no signs of leakage anywhere.

What local diagnostics specialist has done: DPF was showing 200% soot content due to EML showing for 1000 miles - after cleaning, he told local ECU it had been changed and now reading zero. MAF sensor fault will not clear with ignition on (engine off), or engine on, it remains. This makes me think it is electrical?

Question: With Ignition on, but engine off the MAF read 658mg per stroke. The new MAF I bought reads identical to this too. Multimeter reads the same through all pinouts. When disconnected it reads zero (diagnostics also sense open circuit). Is there a typical readings chart or some sort I could use as a reference?

Is there anything else I can check?

Thanks

 

[grober]

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[Graham1991]

Thanks very much for the reply, Graeme. I only managed to get a look at this last night.

I carried out the testing in the video and supply and ground seem fine. I was getting 0.6V at idle and a solid 0.84V at 2000rpm. I can't find anywhere what is the expected voltages should be?

I've found a mobile mechanic with Star diagnostics up here in Inverness who I am really hoping will find the solution for a reasonable cost.

 

[Jobsworth]

I think the clue is in the word algorithm. It's a calculation error. The air mass measures the intake air, the MAP sensor measures manifold absolute pressure, the boost pressure sensor measures the turbo boost air and another sensor measures the ambient atmospheric pressure. Calculations are made about the air from a combination of these readings. If you only had the error with the engine running I'd say boost leak. If you have an OM651 in your van there are myriad possibilities. However your fault codes will not clear at rest, so I think one of these sensors is giving an incorrect reading all the time.

 

[Mikemercedes]

Thanks very much for the reply, Graeme. I only managed to get a look at this last night.

I carried out the testing in the video and supply and ground seem fine. I was getting 0.6V at idle and a solid 0.84V at 2000rpm. I can't find anywhere what is the expected voltages should be?

I've found a mobile mechanic with Star diagnostics up here in Inverness who I am really hoping will find the solution for a reasonable cost.

Hi do you ever get to the bottom of the p010106 I have the same issue I found a split intercooler pipe replaced it but I can’t clear the code I’m using icarsoft fault is there ignition on engine off any help would be much appreciated