Particulate Trap Bank 1 P2002 00 [237] - Efficiency Below Threshold

[gareth23]

Hi,

The dreaded EML is on and I've had a look with VCDS at various pressure readings and the soot/ash readings and it appears the car thinks the DPF is clogged, since I bought the car 15months ago I've checked the DPF occasionally and its gone from 54g of oil ash mass to 60.3g over the last 20,000 miles which is what also makes me think it is full.

I've had a look around and various sources mention it could be the EGR cooler and not the DPF, but since the car had done 135,000 miles I think both may be needing cleaned or replaced?

At the moment I've resigned myself to having to take the DPF and EGR cooler off the car but before I do this is there anything I've missed checking to confirm the issue or point elsewhere? I'm assuming all the cleaning products that I could add to the fuel or inject direct wont clean the ash from the DPF or the adblue that appears to clog the EGR cooler?

The car is a 2014 B8.5 2L diesel saloon with a CNH engine. I can post the VCDS log if anyone is interested?

Thanks all :D

Gareth.

[Crasher]

Post the Full car scan including the VIN plus all the ash and soot values found in advanced measuring blocks using the search.

[gareth23]

VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64

[gareth23]

39123

39124

[Crasher]

The soot isn't high enough for it to carry out even an active regen whilst driving never mind a service or forged regn. The ash is getting there but there is a good 40k miles of capacity left so it begs the question what is it upset about? In this case we would fit and calibrate a new GENUINE ONLY DPF pressure sensor 03L 906 051 D and also take the reductant additive injector out and have a look inside to see if there is any signs of urea cement as I now call it. If it looks clear then we would do a service regen whilst standing until it kicks out and see how it goes. If the fault comes back you are looking at having to remove and clean the reductant system which is a HUGE job. We have now decided next time to lift the engine out instead of trying to do it with the engine in. The last one on an A6 Ultra took my chap two days to get out after lifting the engine to one side and after two days of rebuilding he had booked a day off so I spent a day finishing the job off so five days work on a lift in the air with all the kit and experience... bloody stupid design!

https://live.staticflickr.com/65535/52972418800_282e3516ac_o.jpg (https://flic.kr/p/2oGZuzw)

[gareth23]

Hi Crasher,

Thanks for the reply, really appreciated :o

I'll get a new sensor for it, once its fitted do I need to do anything in VCDS? Something rings a bell about an adaptation? When you say reductant additive is that the Adblue and thats the injector in the large hole at the front of the Cat/DPF assembly? If it is I'll pop it out next week and take a look.

[Crasher]

Ye, the adaption needs a login which comes up and then go to the basic setting menu.

[gareth23]

Is this the one? Just a moment... (https://www.*******.co.uk/bosch/15484150)

My local TPS wants £90 inc vat and the ******* one is roughly £58 all in.

[Crasher]

The link won't work but I said GENUINE ONLY for a good reason based on bad experience, you can learn from my mistakes instead of making them for yourself.

[gareth23]

Yeah the link and supplier name is getting blocked by the forum, I tried to fix it but no luck, then I thought I'd just delete the post but cant seem to do that either :(

The image in the link looks exactly the same as the one below which is whats on the car, just wanted to make sure I'm not replacing a copy with another copy...

Also there are two identical sensors back to back on that bracket, from looking at the car and a parts diagram the one facing forwards appears to measure the pressure against atmospheric pressure from a point between the two cans on the DPF assembly, I cant see where the other one is connected but will keep looking. Should I replace both?


39127

[gareth23]

I've finally managed to find time and swap the sensor, after an adaptation and an EML reset it was ok for 100 miles before the light came back on.

I pulled the Adblue injector at the same time as I swapped the sensor, it looked clean with a light covering of soot that wiped off

39175



I've just read the thread again and realised I didnt do a service regen after changing the sensor :banghead: