sidshock

ok, I got these 2 codes or is it one code??
I dunno..
it is: P200B/P201D

is that my Air mass ? or something else?
or my Air mass and another??

tx.

JDM

Year,make,model, I'll look it up and see If I can find them..

RobertG

since we're on the subject , how about 2001 e-320 p2016 & p2085?

JDM

Okay, somthing is goofey. I'm connected to mitchel online and all the code charts for MB only list codes starting at P0100-to-P1747. NO P2... codes. I tried the E class, then went to C class, same charts, same # range. Whered you guys get your codes? Or maybe I should ask mitchel where they got theirs?

JDM

For '01 e 320 it shows, for example, P0100= Hot Film MAF, P0156-161=O2 sensors,P0700's=Trans and ECU codes, P0300-306=Missfires,P0200's=injectors, and so on, Lots of codes available, but not up to P2000.

RobertG

I dont recognize these codes either , I was wondering if these codes are MB codes only , I used my Snap-on scanner to retrieve them

JDM

I asked one of the tech's if the scanners had their own versions or somthing, he did'nt think so. We have a snap-on modis here, and it's codes so far match the on-line shop manual, witch is supposed to be a copy of all the manufactures info.(by liscence) Wierd. Love to help, sorry.

RobertG

Thanks for looking into it.I tried to plug my scanner to the OBDII plug under the dash and it said no comunication, so I had to buy a new round plug to plug into the connector that's under the hood.I can comunicate or see data and I can clear codes.When I saw these two codes I didnt recognize them simply because of the high number that's why I thought that they might be Mercedes Propriaitary codes used only by Mercedes .

My scanner told me that the P2016 codes is partial load failure bank 1 and P2085 is partial load failure bank 2.
Can you or your friend look into what could cause that failure?

JDM

Okay, so I dug and dug and the best I could do was find "partial load failure Bank x" associated with code # P0170 & 0173=Self adjustment (adaptation) of mixture formation for corresponding cylinder bank (1or2) to threshold limit value of ME-SFI control module. Basically the way I read it is the car over or under adjusted fuel mixture or pressure, exceeding the preset value range in the control module. Possible causes were listed as an air leak (intake/injectors/fuel syst) or fuel injector failure, faulty fuel pressure regulator, or mechanical wear.(valves or pistons) The module is constantly monitoring and will set the mil off anytime it goes out of range. Should turn light off after 2 driving cycles as long as condition went away.

JDM

If there is a problem, my first guess would be the fuel pressure regulator, at least the C class is notorius for this component being a little edgy.

RobertG

thank you very much for taking your time and looking into it

sidshock

RoberrG : you hijacked my thread! quit it!!

ok, it is a 2002 C230K coupe...
thanks for any input here are the codes again:
it is: P200B/P201D


they were pulled by the dealer.

bullyap

P201D Selfadaptation of mixture formation, Mixture is too rich at idle speed.[P0172]

-Check prerequistites
>Lambda control enabled
>Function of self adaptation of mixture formation enabled
>Coolant temperature higher than 75'c
>No engine oil dilution due to fuel

*In order to determine a new value for the mixture formation self-adaptation, it is necessary to undertake a journey of approx 30 minutes with lambda control enabled. The coolant temperature must be less than 60'c during start.