W212 E250 cdi dpf issues

[fatjay]

Ok here i go briefly I have a 2012 E250cdi with 207k miles so this week I had an engine light come on into limp mode and no revs after 2500rpm no kickdown had the code read came up p065100 and p02463 so here is what Ive had done i had the exhaust back pressure sensor changed no change on the drive home next morning drove fine good revs and kick down no issues turned off engine and light came back on out first thing they suggested so £55 plus fitting later no joy then they said fit this a204 440 64 40 its a wiring harness repair kit £25 plus fitting later im not sure this is wired the correct way they say they pinned it out and it is still no joy so today they said dpf needs cleaning so taken off cleaned all professionally by dpf specialist £310 later i still have the same p065100 code and no kick down so any ideas where i go from here does anyone have the diagram for fitting a204 440 64 40 any other ideas as im a bit lost could it be the ecu? can this be tested im just a bit lost any ideas help appreciated or where to start or go next thanks in advance

 

[OneForTheRoad]

P0651 Mercedes-Benz: Code Meaning, Causes, Symptoms, & Tech Notes

This fault code is stored in the Engine Control Module (ECM) when a malfunction occurs with the sensor supply voltage circuit. The engine control module

www.engine-codes.com

 

[fatjay]

so is this an ecu fault?

 

[OneForTheRoad]

so is this an ecu fault?

Did you read the chaffed wiring part

Which will return an ecu fault .

 

[fatjay]

i read the post i guess that there is a short somewhere im not an expert but also saw poor connection but there has to be a definitive answer

 

[OneForTheRoad]

i read the post i guess that there is a short somewhere im not an expert but also saw poor connection but there has to be a definitive answer

Unfortunately lifes not that simple, 1 fault triggers a daisy chain. All you can do is follow that chain and check everything. Sometimes its the simplest part .

For instance I had abs issues, I lost power steering, speedo, pre safe , rear lights would stick on, couldn't select drive . Finally found the issue by chance , the nut on the earth for the abs pump was loose. Something that potentially could of cost me alot of money.

Did these people bother to scan for live data on the dpf pressure sensor at all ?

 

[fatjay]

ok so here is an update had it star tested yesterday they said its the exhaust back pressure sensor but its down near the erg cooler not the movie cam senor dpf one anyone have a part number for this spoke to Mercedes and its like i speak mandarin and they have no idea what im on about i think ill try a different dealer maybe

 

[Tonygw]

where are you based? Is there a specialist near you?

 

[OneForTheRoad]

ok so here is an update had it star tested yesterday they said its the exhaust back pressure sensor but its down near the erg cooler not the movie cam senor dpf one anyone have a part number for this spoke to Mercedes and its like i speak mandarin and they have no idea what im on about i think ill try a different dealer maybe

If its a om651 its near the turbo. Most are inc the om642 v6.

 

[Petrol Pete]

ok so here is an update had it star tested yesterday they said its the exhaust back pressure sensor but its down near the erg cooler not the movie cam senor dpf one anyone have a part number for this spoke to Mercedes and its like i speak mandarin and they have no idea what im on about i think ill try a different dealer maybe

Don't waste too much of your time talking to Mercedes Benz about a mechanical fault with your 13 year old car , you will be very lucky to find any one of them that gives a flying fruck. Unless you drive it in there and hand over your credit card of course.

Stay on here for advice and find a decent MB independent near you . Good Luck .

 

[fatjay]

so i have had the map senor done now and had the back pressure senor done and still no kick down the star diag said back pressure senor now im thinking that maybe its a power issue to the sensor im looking to get that checked next still getting the p065100 error the test said no ecu errors that what he told me so my logic says power to the back pressure senor so ill see if i can check it has a reference voltage of 5volts and go from there i guess

 

[drcool70]

Is dpf and egr delete a good solution
I’m having similar problems honestly
Asking 250 £ dpf cleaning plus sensor which will cost extra dpf is 90/ blocked

 

[OneForTheRoad]

Is dpf and egr delete a good solution
I’m having similar problems honestly
Asking 250 £ dpf cleaning plus sensor which will cost extra dpf is 90/ blocked

You need a scanner to test pressure sensor , if it fails ,it tells lies about dpf fill levels.