DPF Forced Regen - OBD tool - recommendations

[Mr_o_uk]

Whilst I’m thinking about it, maybe I’m missing something.

is it just min 2500rpm you have to be at or a certain speed as well?

Is there a dpf warning light that I’m missing before the red MIL?

Thanks,

[MikeGC]

Sounds like you do a lot of short trips. Can be a problem with diesels. Italian tune up works to a certain degree. 70mph in 4th gear for a good long stretch will help clean it out, but will only be a short term solution.

Yes, a lot of short trips with some long journeys mixed in (but obviously not at the right time!). I wish I had read up on dpfs before buying, but you live and learn. Will swap to something else when I can!

I can bomb it down the motorway when needed, but I have no way of knowing when it’s needed. It just goes straight to a red MIL? I’m hoping an obd will at least tell me what the percentages the filter is at i.e. when I need to take it out for a long run.

The advice I was given was to do a 20 minute drive at 2500rpm (no specific speed) once per month to ensure the health of your dpf

[goodoane]

None of the cheap OBD2 scanner will do a Force Regen of the dpf. You have to know that after every forced Regen you have to change the oil and oil filter.

Why do you have to change the oil? What can a forced Regen do to it?

The regen is been done at 700-800 celcius degree to be able to burn the ash from dpf that's why you need to change the oil.

[humbos]

You can't burn ash! Ash is the killer. A regen deals with soot. Seriously take it for a run (refer to handbook for instructions) if you are doing long runs and the issue persists the car has a fault... period! Get a qualified mechanic with the correct equipment and knowledge to diagnose the issue. It's cheaper in the long run to have it accessed properly rather than guessing! Cheers.

[humbos]

https://eurofitautocentres.co.uk/diagno ... eneration/

[Mr_o_uk]

Sounds like you do a lot of short trips. Can be a problem with diesels. Italian tune up works to a certain degree. 70mph in 4th gear for a good long stretch will help clean it out, but will only be a short term solution.

Yes, a lot of short trips with some long journeys mixed in (but obviously not at the right time!). I wish I had read up on dpfs before buying, but you live and learn. Will swap to something else when I can!

I can bomb it down the motorway when needed, but I have no way of knowing when it’s needed. It just goes straight to a red MIL? I’m hoping an obd will at least tell me what the percentages the filter is at i.e. when I need to take it out for a long run.

The advice I was given was to do a 20 minute drive at 2500rpm (no specific speed) once per month to ensure the health of your dpf

I think I’m doing this. Maybe there is something else wrong.

Would still be nice to see a visual of the state of play though.

[Mr_o_uk]

You can't burn ash! Ash is the killer. A regen deals with soot. Seriously take it for a run (refer to handbook for instructions) if you are doing long runs and the issue persists the car has a fault... period! Get a qualified mechanic with the correct equipment and knowledge to diagnose the issue. It's cheaper in the long run to have it accessed properly rather than guessing! Cheers.

I’m doing a long run at least once a month. Maybe there is something else wrong or I’m missing something.

Would be nice to see a visual of the dpf status though to make sure I’m doing a long run at the right time etc.

Have ordered a WiFi obd ‘plug’. Will see what the apps tell me then take it to a specialist if the problem persists.

Cheapest for me is the RAC man though, and he tells me it’s all fine after a Regen!

[Noddy1875]

[Territorial_]

I bought the Foxwell nt650. This tool could not perform forced DPF regen. Should we have a new discussion just for OBD diagnostic tools.. it think it would be nice to share our experiences with different diagnostic tools.

[Deleted User 3871]

I don't understand all the in's and outs, but its to do with fuel getting into the engine oil. This is from Honest John

DPFs also have an 'active' cycle where additional fuel is injected into the combustion chambers to create hotter than normal exhaust gases to burn off particulates in the DPF. However, this does not always work, particularly if the car has done a high proportion of short runs from cold starts and instead of burning off the particulate the extra fuel can instead find its way into the engine sump, contaminating the lube oil and sometimes leading to such a rise in sump oil level that the engine can start to run uncontrollably on its sump oil and will self-destruct.

https://www.honestjohn.co.uk/faq/diesel ... e-filters/

None of the cheap OBD2 scanner will do a Force Regen of the dpf. You have to know that after every forced Regen you have to change the oil and oil filter.

Why do you have to change the oil? What can a forced Regen do to it?