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1.5dci 110hp problem?

Posted By Panver Thursday, July 04, 2019 8:06:16 AM
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Panver
 Posted Thursday, July 04, 2019 8:06:16 AM
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Hi there,

Excuse me if there is similar topic. I cant find something as i searched. Also i know that it is difficult via forum to diagnose a problem but i would like to have an opinion or a possible solution by someone that might had something similar to my problem. I cant find solution and i am very confused.

Well, my car is Mercedes A class with renault diesel engine 1.5 110hp. At last three weeks i noticed that it does dpf regenerations too often. Despite that in these engines is difficult to realise it, i heard that sounds a bit different. So, i bought an obd tool and via smartphone my thoughts are corrects..
My car is doing dpf regenerations every 35 kilometres.

I went to local dealer and car has no any fault and they cant do something at this moment. So i am very confused.

Some infos:

50.000 km, new car with 2/3 of distances in motorway. Usually 2000-2500 rpm.

Also, as i see via smartphone my car has oil dilution 2%, and soot is very easy to collect if i drive over 2000rpm.



Sorry for my English, i tried to be clear. If any question please ask me..

Thank you for your help in advance.
K And R
 Posted Friday, July 05, 2019 3:17:09 AM
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Panver

"t does dpf regenerations too often" but is it completing the re-gen ?


Kev.

"If you dont KNOW how it works, don,t try to test or fix it"
CYRIL (T)
 Posted Friday, July 05, 2019 4:42:33 AM
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Give Kevin an answer plus somewhere in your data it might tell you the distants between regeneration over the last 10.Plus if you are not driving at a set speed for aleast 20 mins (no accelerating in beween)and normal operating temp then it wont complete the regeneration.The best way is to use the motorway for an hr 40/50 mph top gear steady throttle.

Regards

Cyril

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Friday, July 05, 2019 4:45:36 AM by CYRIL (T)
Panver
 Posted Friday, July 05, 2019 6:38:00 AM
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K And R (5/7/2019)
Panver

"t does dpf regenerations too often" but is it completing the re-gen ?


Kev.


Thank you for your answer.. Yes it is completing. I saw it in my obd tool and local dealer too.. All regenerations are completed and the reason is that i have the smartphone to see it, so i dont let the car without completing the regens.. Anyway, ths is the strange thing and i am confused..
Panver
 Posted Friday, July 05, 2019 6:44:40 AM
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CYRIL (T) (5/7/2019)
Give Kevin an answer plus somewhere in your data it might tell you the distants between regeneration over the last 10.Plus if you are not driving at a set speed for aleast 20 mins (no accelerating in beween)and normal operating temp then it wont complete the regeneration.The best way is to use the motorway for an hr 40/50 mph top gear steady throttle.


Thank you too. The problem is that it does regenerations too often. They are completed all of them. According to my obd tool the mystery is that the dpf soot increases much more with light acceleration in normal speeds than with hard driving and the result is that dpf is full in 35 kilometres so regeneration comes.
Friday, July 05, 2019 6:50:45 AM by Panver
Iver
 Posted Friday, July 05, 2019 8:42:10 AM
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the result is that dpf is full in 35 kilometres so regeneration comes
.

That is too often, but how much trust do you have in an OBD tool. A better tool may give you a better insight into what is going on. It will also allow adaptations, a forced regen amongst other things. It is a shame that the dealer didnt suggest these things while it was there.


Moving on do you have a sensor that is reading incorrectly so a good hard look at datastreams to confirm plausibility wont hurt. Again the obd tool wont be enough there.
K And R
 Posted Friday, July 05, 2019 9:28:33 AM
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Panver

Year? exact engine code/type ?

i would be checking the dpf pressure sensor both in live data and calibrated low pressure air (your dealer is unlikely to do this)

Kev


"If you dont KNOW how it works, don,t try to test or fix it"
Panver
 Posted Friday, July 05, 2019 9:38:37 AM
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Thank you very much for your answer. My obd tool matches with results of dealer's original mercedes diagnosis obd tool.. So, the next step is an appointment for a hard look as you said. Next week i'll go again. But at this moment with no fault they have no idea what is the reason. Sad
Panver
 Posted Friday, July 05, 2019 9:41:12 AM
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K And R (5/7/2019)
Panver

Year? exact engine code/type ?

i would be checking the dpf pressure sensor both in live data and calibrated low pressure air (your dealer is unlikely to do this)

Kev


Year 2015, engine is k9k of renault 1.5 110hp OM607 for Mercedes

Thank you very much for your help, again!!
Friday, July 05, 2019 9:49:51 AM by Panver
Thema
 Posted Friday, July 05, 2019 11:57:20 AM
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Iver (7/5/2019)
the result is that dpf is full in 35 kilometres so regeneration comes
.

That is too often, but how much trust do you have in an OBD tool. A better tool may give you a better insight into what is going on. It will also allow adaptations, a forced regen amongst other things. It is a shame that the dealer didnt suggest these things while it was there.


Moving on do you have a sensor that is reading incorrectly so a good hard look at datastreams to confirm plausibility wont hurt. Again the obd tool wont be enough there.


That is good advice. Obviously on what you've told is there is something wrong. Several possibilities but it MAY (and please note I only said may!) be that the DPF itself is simply too blocked to clear for any length of time. Also differential pressure sensor failure, blocked pipes and so on...
I do feel that you're going to need better tools than a smartphone based OBD reader though along with a bit of "lateral thinking".


Peter

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