DPF risk of particle filter becoming blocked

[shtu]

I gave the old dpf a good clean off the car and the pressures are much lower now about 3mbar idle and 80mbar at max revs.

That sounds pretty promising, I found P1490 seemed to come up past 100mbar.

I did get a brand new tank and ran the flow test but still not getting 20ml I got more than the old one but about 7ml. Am I doing the test correct. I connected a pipe from the tank pump to a measuring device and ran the test in diabox don't understand why not 20ml from a new one

There's not much to do - you trigger the test, the pump wil tick tick tick for several minutes, catch the fluid that comes out (I used a big yoghurt pot), and see what you get.

Did you buy an OEM tank or aftermarket? Neo Brothers sell the OEM one for about a tenner more than the copies. I bought a used OEM one.

What version of diagbox do you use?

7.62

On the resets fromt, I went for,

Replacement tank
Replacement pipes (That should set the pump ticking for a LONG. TIME. Much longer than you might expect.)
And you should also set a replacement DPF too, as you've cleaned it.

On mine, I started off the replacement parts procedure from the tank module, and diagbox changed across to the engine module during the process.

[pauljbl]

There's not much to do - you trigger the test, the pump wil tick tick tick for several minutes, catch the fluid that comes out (I used a big yoghurt pot), and see what you get.

Did you buy an OEM tank or aftermarket? Neo Brothers sell the OEM one for about a tenner more than the copies. I bought a used OEM one.

Yes I noticed the light would come on around 100mbar

The tank was a brand new genuine Citroen tank. Was wondering if the software version could cause it to pump out the wrong amount . I am using ver 9 diagbox

[pauljbl]

Also on a new additive tank I couldn't get it to change from 1litre capacity to the 2litres I had filled it with. If I go into the fuel pump in diagbox and read the values it says 2 litres. But then if I go into the engine ecu it says 1litre. I did the press the fill tank option in both the fuel pump section and the engine ecu section but stays at 1 litre

As I mentioned previously the values are calculated, not physically measured. The issue may be because it has not been correctly reset - you should be setting the additive counter to zero.

Make sure to use the priming function and also note that you may need to do this is 2 areas if it is not resetting - sometimes in the engine ECU, by selecting and confirming the ECU after a global test, then in the engine ECU menu there should be some options for operations concerning the additive / DPF system, but you'll have to have a hunt around. The other area may be in the main repair menu in Diagbox, again have a look for similar functions until you find the right options. I can't be more specific as these often change with different software versions and models.

I could get it to reset OK by going into the 2 different areas like you say but my tank capacity is different than what it was before.

Also I noticed there's a setting for the amount of additive deposited into the filter do I need to change that or just leave it?

[GiveMeABreak]

No that's just telling you how much of the additive (Cerine) in grammes has been deposited in the filter since it was new. This should be reading near zero once the DPF has been replaced AND you have told the engine ECU that the DPF has bee replaced.

If you are having issues I suggest you get the dealer to reset it as obviously there's something not working with your diagnostic kit.

[shtu]

I would have thought it unlikely to be affected by the version used, but these French things defy logic at every turn.

Tank capacity - diagbox gave me no choice, as the vehicle selection had defined the maximum capacity. The fact there's an extra litre sloshing about that my ECU knows nothing about? Not really a problem.

The amount of additive deposited (and a few other values) should be zeroed when you carry out the DPF replacement process.

I feel like you should take a deep breath, and just slowly work through the parts replacement processes again. Tank, Pipes*, DPF.

*not strictly true, but re-primes them.

[GiveMeABreak]

I'm not sure what the issue is regarding tank capacity - the tank is the tank - there's no setting for the size, the system knows what size it is supposed to be from factory, so there's no need to stress over this. You just need to fill it and reset the additive counter to zero and if the DPF has been replaced also inform the ECU that the DPF has been replaced.

If your diagnostic tool is unable to do it this it could be an issue with the VCI not being full chip or missing some component or a software version - hence why I suggested getting the dealer to sort it out. It won't be the first time I've seen someone wasting days on end trying to deal with it when the dealer had it sorted straight away.

It's also not uncommon for there to be issues with the software version that can affect systems or cause errors - so they fix these on the next update and so it goes on and on - there's always problems with systems, so they are continually updating Diagbox because of the thousands of components across all the marques.