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Chat Area => General Car Chat => Topic started by: Jimbob on 01 February 2026, 16:53:14

Title: Merc MAF code
Post by: Jimbob on 01 February 2026, 16:53:14

Ive got a P010162 code : MAF sensor 1 has a maulfunction.  The signal comparision is faulty.

Car is in Limp, EML on and wont clear
W212 OM651 engine

Ive checked all the hoses I can see, had both boost pipes off, HP one was changed last year as it burst.
Can see, or feel, or anyway detect an air leak anywhere.  Used light, feel, very basic smoke test (bottle full of smoke near inlet)

Any ideas what next?  I fear its an inlet manifold swap which doesnt look huge fun.
Luckily ive a little project car I can drive while I work on this.

Some reports from my Topdon tool - expand professional report section
https://euait.x431.com/Home/Report/reportDetail/diagnose_record_id/2b77a267getZ3bAEDhAEnROMoG/report_type/D/l/en-us (https://euait.x431.com/Home/Report/reportDetail/diagnose_record_id/2b77a267getZ3bAEDhAEnROMoG/report_type/D/l/en-us)

https://euait.x431.com/Home/Report/reportDetail/diagnose_record_id/211a1316getZ3bAEDhAELrDhnR/report_type/D/l/en-us (https://euait.x431.com/Home/Report/reportDetail/diagnose_record_id/211a1316getZ3bAEDhAELrDhnR/report_type/D/l/en-us)

Title: Re: Merc MAF code
Post by: Doctor Gollum on 01 February 2026, 17:37:03

Has the air intake hoovered up some water?

Title: Re: Merc MAF code
Post by: Jimbob on 02 February 2026, 05:19:00

Quote from: Doctor Gollum on Yesterday at 17:37:03

Has the air intake hoovered up some water?

Nope, not even been through a big puddle

Title: Re: Merc MAF code
Post by: Marks DTM Calib on 02 February 2026, 07:36:44

DPF diff pressure very low and yet there is a back pressure of over 1 bar?

What state is the EGR?

Title: Re: Merc MAF code
Post by: Jimbob on 02 February 2026, 08:27:17

Quote from: Marks DTM Calib on Today at 07:36:44

DPF diff pressure very low and yet there is a back pressure of over 1 bar?

What state is the EGR?

Untouched in my ownership!

Title: Re: Merc MAF code
Post by: TheBoy on 02 February 2026, 08:32:17

Fill level of DPF = 180% ? That doesn't sound right, although I know nothing about diags on that car.

Title: Re: Merc MAF code
Post by: Jimbob on 02 February 2026, 08:50:23

Quote from: TheBoy on Today at 08:32:17

Fill level of DPF = 180% ? That doesn't sound right, although I know nothing about diags on that car.

I beleive ash / soot differences, and full is about 400% but could be wrong