delete PAT fluid system on 2017 Dispatch

[Peter Palmer]

Hi, I know you can do this, O'riely's autos on youtube has done it but he uses a launch UK diagnostic tool, I have diagbox 9.68 and one of the fault codes is the multiplex pump.

The van is going into limp mode and it had a couple of DPF errors, probably to do with the pat fluid faults, I've checked the pressure and at 3k revs its about 30mb so I think the DPF is fine and I've done the replacement DPF in diagbox, I have also tried to say the PAT fluid tank has been refilled (I haven't refilled it) but it just returns an error so for now to see if I can get the van to drive normally I want to delete the pat fluid system, I've looked in every bit of diagbox and the closest I've found is viewing the parameters and it says it has a multiplexed pump, if I try and change that setting it wants an internet connection.

Is this one of those things you need a connection to citroen to do? cant find much info on the internet.

Van is a 2017 67 1.6 HDI

[Paul-R]

I'm afraid the forum does not condone removal of emissions control systems and does not give any help towards this. The practice is illegal and by making this modification could put you in breach of your car insurance.

For what it's worth I'm not at all sure that a Diagbox can do this anyway.

[PaulC5]

What I do not understand, why are you not fixing the fault and preferring to try something that may be illegal ? If not fixed if you want to sell the van you will need to declare it.

As noted above about insurance, when you renew it they always ask if there are any modifications and you would need to declare it at which point you may find your insurance is not renewed.

[wheeler]

If you delete the PAT fluid system without doing a full DPF delete the DPF would likely clog way faster than normal as it uses the PAT fluid to assist with regeneration.

[Peter Palmer]

Firstly, I want to delete the pat fluid for now to see if it stops the DPF warning coming on, I've actually got a litre of fluid in my workshop which I will fill the tank if it works, but after two hours of searching with diagbox I cant even find the resting fluid page, I did actually find a section somewhere that was something along the lines of bleeding and fluids which I had a dabble with. Its certainly not the same procedure as version 7.

As for it being illegal to delete it I cant see that, that would mean that it would also be illegal to drive with an empty pat fluid tank but there isn't even a level indicator on it, people could drive round for years with a none functioning system, its not like checking a bulb or washer fluid.

Anyway according to Jimmy O'reiley its not even really needed.



So onto the problem, the codes I'm getting are these.



I've definitely told the vehicle its had a new DPF, how does it determine its clogged other than the differential pressure sensor, there aren't any other sensors on it as far as I'm aware and the readings at idle are

[Peter Palmer]

3000 revs (shows 2200 but slightly delayed data)



This is the bizarre thing though, on one page it shows the reservoir is nearly full



Yet in the pump section it shows its empty and for the life of me I cant find where you reset that.



Just noticed as well, its says its done 70k Km since the DPF was replaced yet I told it it had had anew one earlier today, is that something else you have to update in 10 different places as well.

Even though I do about 25-30K a year I think I'll get a petrol van next time, I would gladly take the hit on fuel if it means I don't have to spend virtually every weekend trying to keep a diesel on the road, diesels are a dead stick now, not because of the environment but because they go wrong with cripplingly expensive bills every time you get in them, should have been the most simple reliable engine in the world.

[Peter Palmer]

The consensus on this thread is you need on-line access to reset the fluid level on vehicles post 2015, so its main dealer only reset then.

https://mhhauto.com/Thread-Peugeot-3008 ... set?page=2

How is it that tools like the Launch eurotab and Autel ones can do stuff like this but diagbox cant, do they have dealer access on them or something, the eurotab works on nearly every vehicle surely it cant have access to all manufacturers on-line systems.

[wurlycorner]

I believe the high end launch (etc) tools can have access to manufacturer records in the background, yes - otherwise they couldn’t do things like ECU recoding etc.
They just include it in the price of the tool and because they sell higher volumes (and aren’t in the position of wanting to be protective of main dealer network only tools) can be able to provide it less expensively to the consumer.

[Peter Palmer]

This video also in the comments seem to suggest you need dealer access to reset the fluid level.



Pretty disgusting really, its a fluid that certainly will need replacing sooner or later and citroen/Peugot etc are forcing you to give them money in order for it to happen, I thought we had a right to repair vehicles in this country without being held to ransom by the dealers. whats stopping them making you pay them money every time you have to refuel? apart from losing every customer obviously.

[wheeler]

As for it being illegal to delete it I cant see that, that would mean that it would also be illegal to drive with an empty pat fluid tank but there isn't even a level indicator on it, people could drive round for years with a none functioning system, its not like checking a bulb or washer fluid.

I suppose its about knowingly having an empty tank, yes there is not a direct level sensor but there is an (estimated) low fluid warning.

Personally i know what i would be doing with it but i dont want to mention it on here or i will end up with Greenpeace abseiling in through my windows

Dont even get me started on Adblue systems. There is no way i would be spending £1000 plus fixing this system that is still not fit for purpose only for the tank to go down again in 18 months time

Also if a previous owner had these things system removed how would you know??

Even though I do about 25-30K a year I think I'll get a petrol van next time, I would gladly take the hit on fuel if it means I don't have to spend virtually every weekend trying to keep a diesel on the road, diesels are a dead stick now, not because of the environment but because they go wrong with cripplingly expensive bills every time you get in them, should have been the most simple reliable engine in the world.

Dont know if you are aware but many petrol engine are now fitted with a gasoline particulate filter, you'll need to go electric if you want to escape it

[tricoloured]

Hi

I've had a few similar DPF and additive tank issues with my 2018 Expert van 181k miles but have been able to sort them with my Foxwell NT510 Elite (was about £115) I bought it after my Lexia clone died, I know the same can be done on higher end devices such as Snap On etc but couldn't justify the cost.

I haven't tried to delete the additive system so don't know about that one, I also learnt that I need Diagbox connected to the PSA server in order to add a new additive tank after I had bought it (was about £145 from Neo Bros) but after I reset / told it that I had refilled / cleared codes a few times the existing tank has behaved itself so the new tank is on the shelf for now.

I have learn't that using the Foxwell to clear the additive tank permenant fault P1434-96 I had to do it in the order of clearing faults 1st additive tank ECU, 2nd BSI, 3rd engine ECU, it came up with P1434-96 after diesel fill up but after clearing it showed that additive had been used as I had checked the tank amount before filling up on several occasions.

I also told it that a new DPF was fitted after cleaning without any issues.

I'm mostly doing short journeys infact I've only done 12k miles in just under 3 years but it regens ok even whilst in slow traffic every 500 - 600 miles, on the motorway it just passively clears the DPF, I fitted an LED behind the drivers mirror connected to the heater which comes on during an active Regen so I know to go round the block until it's finished. Link below if interested.

https://www.peugeotforums.com/threads/r ... or.367922/

Here is a link to another thread where I posted more details about the Foxwell if interested.

viewtopic.php?p=785953#p785953

Hope it's of some use.

Cheers

Bobby

[Peter Palmer]

Slight update, I took the DPF off, left it sat in Wynns off car cleaner for the night and flushed it through this morning, back on the car and strangely at first the pressure differential was way higher than it was before, about 230mb compared to 40 before at 3k revs. However it soon came down to about 20 @ 3k and 2mb @ idle, obviously it was still full of water and cleaner. So thats the DPF blockage sorted but try as I might I cant get to tell it its had a new DPF, I thought I managed it the other day but obviously not.

I go into the repair menu and select new DPF, it tells me to start the engine, which I do (I 've tried it cold and hot) and the this page comes up -



What does that actually mean?

[wheeler]

Have you tried just doing it with the ignition on without running?
Its been awhile since i done this with Diagbox but i cant ever remember asking me to have engine running.

[Peter Palmer]

I've tried everything, at least its out of limp mode now but I still have the PAT reset problem, I actually managed to reset the PAT fluid in one menu but it still shows an empty tank on the pump page and still has the additive error, there is another place to reset the fluid but again when I go forward from that page it then brings this one up :-



As you can see the title above changes to the UREA PIPE HEATING TEST despite being in a totally different section the page before, could be a software bug or maybe I need to test that sensor before I reset the fluid, who knows, ran out of time today.

I actually removed the pat fluid tank and there was plenty of fluid in it already, maybe half full, I managed to get about another half a litre in it before it was totally full, so not sure what's going on with that one, maybe the pump is actually faulty. Its certainly a strange system this diagbox V9. My other concern is because there is a PAT fluid error it might not re-gen and just clog up again although the data page said it last did a regen 3 km ago.