Forced regenration problems

[Lunden]

Hi!
Got an error code saying "catalysttemp to low at regeneration".
Left the car at the mechaninc and they tried a forced regeneration but they were unsuccessfull to do a forced one and went of paying 300€ for nothing.

So I got a proposal on whats need to be fixed for 1500€ among them somewhat oddly specified as "vavle fuel fumes 600€" and "sensor change" 230€" and a new regeneration.

I´m looking in to solving the issue myself and saw that some here had used a program Forscan for the regeneration part and then it´s only to figure out what part that needs to be replaced.
My guess would be the exhuast sensor but not to sure what the other part would be with that kind of dramatic cost that would influence the car on making a successfull regeneration.
Can someone point me in a directions on what could be the other faulty problem?

Also got two side questions here: My friend offered my to program away the DPS and drill a couple of holes and this would fix the problem, not to sure about this but not to keen to overpay.

The mechaninc at the workshop told me he could not read the soot value becuase the regeneration was not possible, is this true or not?

Thanks for all the help.

[metalworker0]

i wrote this explanation a while back may as well use it again.
Then you'll gain an understanding .

O-RILEYS Autos - This is the answer everyone gets here : saves us a lot of time ..and puts you quickly in the know.
You either go along with this or you're at the mercy of a garage that will charge you hundreds

Watch O-RILEYS Autos on youtube ..he mainly does DPFs and mainly Transits, there is nothing he cant solve -- he takes you through it step by step ..watch maybe 4 or 5 videos and you'll have the knowledge

You must have plug in diagnostic scanner though ..or you just cant do it ..
They recommend "Forscan" which is free software that you download to a laptop..you buy the interface cable
You must join the forscan forum ..again free, to get the software and more answers.

https://forscan.org/forum/

To give you some knowledge

The mentoring system has two pressure sensors one before the DPF and one after.
The one after will be reading a little greater than atmospheric pressure, when running, the one before will be a bit greater than that one .. when you have a brand new DPF because of a little bit of back pressure from the core.

As the DPF gets full of soot,, the sensor "before" measures a greater pressure.than the one after. the program in the ecu calculates what the difference is between both sides. as a percentage.
The program knows when the difference between one side and the other exceeds certain values ..it then activates the DPF regeneration.
if the difference is beyond when this can happen, it puts up a fault code . it will probably lead to check engine light and limited acceleration.

Failed regeneration's can be caused by vaporiser blockage..too many short trips or a DPF that is totally blocked... the vaporiser is as fuel injector type device that squirts neat diesel into or before the DPF ..it raises the temperature so that soot is burnt off .
There is also a temperature monitor ..so the ecu knows it is regenerating or if this has failed to happen or if its at too higher temperature ..in which case it shuts down the process, to stop it damaging the DPF .. leading to more codes and errors.

As mentioned watch Videos on youtube by "O'Riley's autos" he tells you how to get around all problems with DPFs , shows you cleaning methods and shows you how to interoperate what your scanner is showing ..how to force regeneration ..the pitfalls, the do's and the don'ts .

Diagrams of typical systems will be found with a google search.

all the best.mark

[knobby1]

Hi!
Got an error code saying "catalysttemp to low at regeneration".
Left the car at the mechaninc and they tried a forced regeneration but they were unsuccessfull to do a forced one and went of paying 300€ for nothing.

So I got a proposal on whats need to be fixed for 1500€ among them somewhat oddly specified as "vavle fuel fumes 600€" and "sensor change" 230€" and a new regeneration.

I´m looking in to solving the issue myself and saw that some here had used a program Forscan for the regeneration part and then it´s only to figure out what part that needs to be replaced.
My guess would be the exhuast sensor but not to sure what the other part would be with that kind of dramatic cost that would influence the car on making a successfull regeneration.
Can someone point me in a directions on what could be the other faulty problem?

Also got two side questions here: My friend offered my to program away the DPS and drill a couple of holes and this would fix the problem, not to sure about this but not to keen to overpay.

The mechaninc at the workshop told me he could not read the soot value becuase the regeneration was not possible, is this true or not?

Thanks for all the help.

Just my humble opinion...the easiest thing to do is gut or remove the DPF and get it mapped out....They are more trouble than they're worth.

Lord Knobrot

[Y-van]

If they charged you 300 for a forced regen with a straight face, I would find another garage.

It takes 2 minutes and then the van does all the work for 30-40 minutes. I could see charging one hour minimum, but.

You can always read the values for soot. It is shown 2 ways, one is a number that I assume is the mass of soot in grams; the other is a percentage. Less than 50% is normal, but if something is not working correctly you can get readings of up to 200%.

Last week a failed experiment left me with a soot of 160%. Once I reversed the experiment it started a driving regen cycle. I drove it on the highway for an hour which brought it down to 50%. Then I ran a forced static regen, which brought it down to 8%.