Peugeot 308sw 16hdi dpf fluid bag pump

[Cheldine]

Hi i would like to ask if there is eneyone that can give me some addvice . I brought a can that used to be owned by my mother-in-law . When she had the car it was always taken back to the dealers to have eney work undertaken . She past away a out 5 years ago and her then partner sold the car on to his nethew. Who basicly just ran the car a d spent little if no money on it . During first lockdown in march i heard he was selling the car as he had brought a new one . So i purchest it from him . I have done nothink but pay out on the car since and i am still having probblems . Basicly i have had a new cat and dpf a new turbo cartridge a new egr valve and have done to oil changes including new filter i have also had a new dpf fluid bag or as Peugeot call it a blood bag i had a garege put it on a machine to let it know there has been a new bag fitted but i do not know if the pump that send the fluid throue is working is there eney way to test this pump and if so how can some one help as i am at my wits end it will run fine but then the engine manigment light comes on and i get a notice saying depolution filter faulty but then if the car is given a quick blast i get a puff of blackish spoke and then the light will go off and it will run fine again ontill next time it comes on can someone please tell me how to check the pump is working and give me eney addvice thanks x

[GiveMeABreak]

The warning you are describing is probably telling you that the DPF filter is getting blocked and the car is unable to regenerate under current conditions. In order for the DPF to undertake a regeneration cycle to burn all the soot off, the exhaust gasses needs to reach a certain temperature (550 ?). The additive fluid injected into the diesel tank reduces the temperature needed down to 450 ?. But if you don't drive the car long enough for the engine to warm up properly and for enough time for the regeneration conditions to be met and complete the cycle, then the filter will become blocked up and you will get the warning.

You need to take the car for a reasonable drive at least 25 minutes or so out of stop and start traffic and at 40 MPH or more where possible to allow regeneration to complete.

Short trips of a few miles and town traffic is going to be the issue, so a good run every week or 2 is needed on these vehicles.