Dpf problems

Xc90driver82 · Jun 2nd, 2021, 20:56

Hi guys newbie here having problems with my XC90, first of all when i bought the car it wouldnt rev up cause the filter was chocked. I the removed the dpf and broke up all the old honeycomb from inside it built it back up to see if it would run or rev up, am getting a engine managment code and wondered wat could be the fault before i go and buy a new dpf or get it remaped. The code is 2A20 particulate filter faulty signal, any infor would be appreciated thanks.

SwissXC90 · Jun 3rd, 2021, 07:43

If you broke up the internals of the DPF, then the DPF has been destroyed.

The pressures before and after will now be implausible, and this will be noted by the engine management system.

You need a new DPF.

Xc90driver82 · Jun 3rd, 2021, 22:13

Hi swiss thanks for your reply u reckon it would be better to have the car remapped or just fitting a new dpf? Thanks

Harley Dave · Jun 3rd, 2021, 22:41

Having the DPF missing or "messed about with" (opened up, gutted and built back up again) will be an MOT fail.

https://mattersoftesting.blog.gov.uk...ots-integrity/

Get a replacement fitted.

Cheers

Dave

Kev0607 · Jun 3rd, 2021, 22:55

Quote:

Originally Posted by Xc90driver82

Hi swiss thanks for your reply u reckon it would be better to have the car remapped or just fitting a new dpf? Thanks

Its an MOT failure to have a missing DPF (on a car that has one, like yours).

You have no option only fit a new one, as you destroyed the other.

S60D5-185 · Jun 4th, 2021, 07:05

You definitely need a new DPF BUT you need to find out why the old one became clogged.

The DPF on these engines is no trouble at all provided everything else on the engine is operating correctly.

The point that I am making is that the DPF was not the problem , something else gave the DPF a problem.

If you simply fit a new DPF it will end up just like the old one, clogged and probably with an accompanying " Soot filter full message "

I would start by checking all of the intercooler pipework and the intercooler itself.

A remap will not cure an underlying problem.

If possible, get someone local with Vida ( Volvo diagnostice ) to see what codes it throws up.

SwissXC90 · Jun 4th, 2021, 09:22

Quote:

Originally Posted by Xc90driver82

Hi swiss thanks for your reply u reckon it would be better to have the car remapped or just fitting a new dpf? Thanks

Fit a new DPF or known good 2nd hand DPF.

These vehicles are only approved for use on public roads with a fitted, functioning DPF.

If you remove the DPF and wish to operate the vehicle, you can only do so off public roads (such as on race tracks, farms and such like).

Xc90driver82 · Jun 4th, 2021, 21:54

My car was used on a farm by an old farmer and putterd around the estate hence the reason the dpf was choked, the other fault im having is the dpf pressure sensor is reading a pressure of 65535.0 hpa could the dpf be causing the pressure problem?

SwissXC90 · Jun 5th, 2021, 06:40

A broken / dismantled DPF will cause a pressure problem.

However, 65535
= binary 1111111111111111
= hex FFFF

which is a maximum value

This indicates a disconnected or short circuited sensor

ltec · Jun 5th, 2021, 20:37

If it was mine I'd remap it.

Jun 2nd, 2021, 20:56	#1
Xc90driver82 New Member Last Online: Jun 17th, 2022 13:08 Join Date: Jun 2021 Location: Dunfermline	Dpf problems Hi guys newbie here having problems with my XC90, first of all when i bought the car it wouldnt rev up cause the filter was chocked. I the removed the dpf and broke up all the old honeycomb from inside it built it back up to see if it would run or rev up, am getting a engine managment code and wondered wat could be the fault before i go and buy a new dpf or get it remaped. The code is 2A20 particulate filter faulty signal, any infor would be appreciated thanks.

Jun 3rd, 2021, 07:43	#2
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	If you broke up the internals of the DPF, then the DPF has been destroyed. The pressures before and after will now be implausible, and this will be noted by the engine management system. You need a new DPF. __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Jun 4th, 2021, 07:05	#6
S60D5-185 Me ? Surely Not! Last Online: Yesterday 19:48 Join Date: Jul 2010 Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.	You definitely need a new DPF BUT you need to find out why the old one became clogged. The DPF on these engines is no trouble at all provided everything else on the engine is operating correctly. The point that I am making is that the DPF was not the problem , something else gave the DPF a problem. If you simply fit a new DPF it will end up just like the old one, clogged and probably with an accompanying " Soot filter full message " I would start by checking all of the intercooler pipework and the intercooler itself. A remap will not cure an underlying problem. If possible, get someone local with Vida ( Volvo diagnostice ) to see what codes it throws up. __________________ “Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic

Jun 5th, 2021, 06:40	#9
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	A broken / dismantled DPF will cause a pressure problem. However, 65535 = binary 1111111111111111 = hex FFFF which is a maximum value This indicates a disconnected or short circuited sensor __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Jun 3rd, 2021, 22:13	#3
Xc90driver82 New Member Last Online: Jun 17th, 2022 13:08 Join Date: Jun 2021 Location: Dunfermline	Hi swiss thanks for your reply u reckon it would be better to have the car remapped or just fitting a new dpf? Thanks

Jun 3rd, 2021, 22:41	#4
Harley Dave Volvo Driver Last Online: Yesterday 00:09 Join Date: Mar 2016 Location: Basingstoke	Having the DPF missing or "messed about with" (opened up, gutted and built back up again) will be an MOT fail. https://mattersoftesting.blog.gov.uk...ots-integrity/ Get a replacement fitted. Cheers Dave

Jun 4th, 2021, 21:54	#8
Xc90driver82 New Member Last Online: Jun 17th, 2022 13:08 Join Date: Jun 2021 Location: Dunfermline	My car was used on a farm by an old farmer and putterd around the estate hence the reason the dpf was choked, the other fault im having is the dpf pressure sensor is reading a pressure of 65535.0 hpa could the dpf be causing the pressure problem?

Jun 5th, 2021, 20:37	#10
ltec Member Last Online: May 27th, 2023 22:47 Join Date: Feb 2015 Location: Northern Ireland	If it was mine I'd remap it.

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