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Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow on November 4, 2010, 8:10 pm

Year of Manufacture *: 2005
Engine Size and Code *: 2.2 Ltr
( Optional ) Scanner Used: ACR G2 and Autologic
( Optional) Fault Codes: P2311 and P2312

Evening All,

I was requested by a local garage to re-programme the engine ECU to by-pass the DPF and install a full re-map. The DPF had been removed and a new turbo had been fitted. The vehicle was going into LOS before and after this work had been carried out. I checked for engine DTC's prior to re-mapping and there were none. However, 2 "unknown" codes were present (P2311 and 2312) which the garage knew about and would not clear. I do not remember the full meaning of the codes but they were to do with CANBUS faults within the auto-box.

After the re-map, vehicle would drive well for about 1 mile and then drop into limp mode. Thinking the engine management ECU wanted a forced DPF regen, I subsequently found this had been carried out 433 kms previously on Autologic.

Convinced this was an auto box CANBUS problem, further investigations indicated that this could be due to water/oil ingress into the ECU located in the passengers footwell. Alas, this was not the case. Checked tinterweb tonight and find the problem could be caused by poor electrical connections to auto-box and possibly gear-box fluid.

This may well be a dead thread, but any info that you can supply will be gratefully received and passed onto the local garage.

Regards

Pete M

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Gwyn Williams <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5354' width='330' height='300' border=0 style='border:none;'> on November 6, 2010, 1:05 am, in reply to "Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Gwyn Williams

Hiya Pete, No codes before you started on it? But the faults were already there? Hmmm. Suspect those 2 fault codes had just been cleared prior to you starting on it, that's probably why they weren't there when you scanned it.
Benz World has your fault codes listed as;
P2311 = Can communication with engine system faulty.

P2312 = 1 or more messages not on Can-Bus or engine temperature not plausible.

Sounds as if the DPF was diagnosed as faulty and causing the limp mode. As the same problem is still there,it seems the problem was elsewhere.

Good luck with it Peter, trust you got paid?

Cheers, Gwyn

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on November 6, 2010, 6:18 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Peter Mutlow

Hi Gwyn,

Thanks for that... As you say the reason for LOS is due to those two fault codes. Autologic people have been very helpful and have arranged for their "list of things to check" to be sent to the garage.

Will be sending the bill to the customer on Monday. Only slight fly in the ointment is that the garage is into the customer for approx £1700 and he will not pay until the car is sorted. My work was carried out for the customer direct....and I understand he is either facing bankruptcy or is indeed, bankrupt. Happy days!

Regards

Pete Mutlow

PS. Gwyn, are you the chappie that used to milk cows prior to work!!?

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Gwyn Williams <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5354' width='330' height='300' border=0 style='border:none;'> on November 6, 2010, 10:29 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Gwyn Williams

No, I'm not that clever! That was my good friend George Pothecary. George has a very large farm just outside Swindon. He is still working on the farm and running his Diagnostics business. I really must give him a bell, I have just realised, we haven't chatted for about 2 years! Time flies, eh?
Hope you get your money, Peter, I hate being ripped off. Saying that, I suspect you knew the score when you started the job, so I guess you won't be too surprised.I suspect you took it on for the challenge! Cheers, Gwyn

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on November 23, 2010, 10:20 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"

Evening Gwyn,

Thanks for that. According to the garage the vehicle has been found to have an auto-box problem and have been accused by the customer of wrongly replacing turbo and disconnecting the DPF to the tune of £1700. Garage wants further £500 to replace gear-box. Customer very miffed and refuses to pay any more and the Trading Standards Agency have now been involved.

I am now piggy in the middle. Still, will give the owner a bell soon to chase my outstanding bill.

Regards

Pete M

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Paul M Marshall <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2832' width='330' height='300' border=0 style='border:none;'> on November 25, 2010, 6:27 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Paul M Marshall - Snap-on

hi pete

this car wouldn't happen to be on the out skirts of lincoln (a46) would it?
just i did the garage a favour (exactly the same vehicle details)and code read it with the merc star only to find fault codes in trans (dtc 2500 impermissable ratio or something like that). auto trans oil level reading very low in live data. i topped it up with what little oil they had and he said it run much better for longer then back to limp mode.
give me a call if you know what i mean ;-)

kind regards
paul

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on November 25, 2010, 9:38 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Peter Mutlow

Evening Paul,

Small world isn't it! Yes indeedy it is the same vehicle. Spoke to the garage the other day and said someone came down to code read it. It apparently only had two and a half litres of ATF in it and the capacity should be seven litres. When it was topped up, all DTC's cleared but still dropped into limp mode. It was then diagnosed (by you?) that a new gear box was required.

Incidentally, the customer was informed that the original map was still in the engine ECU and queried whether I had actually re-mapped the thing. Although, the original file and software number is present, the file had in fact been modified.

Customer also mentioned to me that the car was now back-firing and stalling and queried a bad re-map. Did you find this? However, a quick call to the garage confirmed it was doing this but cured by sticking some diesel into it as it was just about empty.

I am now resigned to chasing this toss-pot through the Small Claims Court to obtain my fee.

Best Regards

Pete M

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Paul M Marshall <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2832' width='330' height='300' border=0 style='border:none;'> on November 26, 2010, 6:10 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Paul M Marshall - Snap-on

hi pete

yes its a small world. i advised them to maybe do a box oil and valve body change before raving the box out.
just a note mate there where no codes in engine when i went in with star!!!
the software tag was still showing fine on star so i guess they mis understood what i said and reading between the lines many men and many stories. good luck getting your money hope you are keeping well maybe we could grab a coffee sometime????

kind regards
paul

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on November 26, 2010, 9:41 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Peter Mutlow

Evening Paul,

Thanks for the clarification. No engine management codes? The thing that bothers me about this is that I introduced a normal remap which would give the vehicle the customary boost in BHP and to customise the ECU map to over-ride any DPF faults. This effectively means that the ECU is unable to produce dtc's relating to DPF faults. Now, when I first went to the vehicle it was showing an EGR dtc which the garage's Solus apparently did not pick up for some reason. After I had done my deed the EGR dtc had disappeared. This I am told is expected. So....I ask myself, if there is an EGR fault would the ECU be able to pick this up now? The answer would be to go back and programme back to original specs and see if the dtc re-appears. More expense for the customer who now appears to be avoiding me. Would hate to see another gear box fitted when the fault all along has been low gear box oil and duff EGR valve...

Next time you are up in my direction then would love to share a coffee or something a bit more frothy...

Take Care

Pete M

Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on March 25, 2011, 9:38 pm, in reply to "Re: Mercedes Benz 220C 2.2 2005 Auto - LOS Mode, fault codes P2311 & P2312 #"
Peter Mutlow

Just to mention that this guy did not pay up and I chased him through the small claims court and got my fee plus costs the other day. He contacted me today by e-mail stating that the vehicle has been recovered to an Auto box specialists in Huddersfield. Gearbox has been reconditioned but fault is still there and now blaming me for the fault. Now telling me I should go there and fix it. No chance of that. So he may be looking for someone in the area to help him out...so beware if you are in the area and get a call.

Regards
Pete M

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