PAT Pump

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

User avatar
GiveMeABreak
Forum Admin Team
Posts: 25418
Joined: 15 Sep 2015, 19:38
x 2832

Re: PAT Pump

Post by GiveMeABreak »

That’s not really going to help.

You should only really do that when you’ve actually replaced it or had it deep cleaned.

Doing that without actually replacing it will muck up the calculations. There are unburnt particles and elements of cerine in the additive fluid that cannot be burnt off along with engine debris and other deposits. It is these elements that eventually caused the blockage of the filter along with the ash.

The mileage you’ve quoted is near the outer limit for replacement of the particle filter anyway. So very sooner more than later it is going to start getting blocked up regardless of regeneration. It’s probably time for a deep clean or replacement.

Forced regeneration is not recommended and only suitable for extreme circumstances. It takes a big toll on the engine components as they are not getting natural cooling from the RAM air affect when the car is moving.
akavintz
Posts: 15
Joined: 13 Jan 2020, 19:34

Re: PAT Pump

Post by akavintz »

Ive got rid of the errors now, looks like theres an order to executing the "replace the PAT fluid" on the ecus.

I think I repeated the process starting with the PAT ecu and then the ENG ecu.

Messages are gone and DPF symbol dissapeared on dash.

I will shedule some time to remove the DPF and clean it any advice on cleaners? Ive heard oven cleaner is good?
V
User avatar
GiveMeABreak
Forum Admin Team
Posts: 25418
Joined: 15 Sep 2015, 19:38
x 2832

Re: PAT Pump

Post by GiveMeABreak »

You can take into many garages now that offer a cleaning service. You need to be very careful what you use, because the cement that holds the filter in place and the filter itself is very sensitive. Even Halfords offer an in-place clean now - regular or deep cleaning services so you might want to let one of these do it for you.
akavintz
Posts: 15
Joined: 13 Jan 2020, 19:34

Re: PAT Pump

Post by akavintz »

Is that an in place clean service they offer or do they remove the dpf from the car?
User avatar
GiveMeABreak
Forum Admin Team
Posts: 25418
Joined: 15 Sep 2015, 19:38
x 2832

Re: PAT Pump

Post by GiveMeABreak »

It's an in-place DPF cleaning service at Halfords - details here for you:

https://www.halfords.com/car-repairs/ad ... ntres.html
wheeler
Posts: 5167
Joined: 21 Sep 2002, 19:07
x 303

Re: PAT Pump

Post by wheeler »

akavintz wrote:
20 Sep 2021, 17:59
Is that an in place clean service they offer or do they remove the dpf from the car?
Some places do in place or removal & clean, You get a much better clean by removing it & doing it properly. On the DV6 engine its really easy to just remove the whole DPF as it separates from the cat. Many garages use Tunapp kit for DPF cleaning, it works really well & can make the DPF like new again, The problem with using it in situ is you cant see if you are getting a good clear out or not.
wheeler
Posts: 5167
Joined: 21 Sep 2002, 19:07
x 303

Re: PAT Pump

Post by wheeler »

Just had a look at the Halfords link, dont think they use Tunapp as they say they leave it to soak overnight with the 'deep clean'. Tunapp specifically instructs you not to leave it soaking for any more than half an hour or so.