Filled up earlier today and no problems when you would expect it to add a dose of DPF additive.

Parked car up at friends house, snow started with a few CM on the gorund, got in car and started it and got Engine system malfunction.

Plugged in my ELM and ran Forscan to be greeted with DPF fluid level too low, it is the first warning of the fluid level being too low since I have owned it.

So do we think the level has suddenly just become low or the cold weather has thickened the fluid and it can't dose it at request or am I needing PAT fluid very soon?

Could really do without this right now.

Fliud won't be to thick, that warning is due to low level. Needs a top up.

It's recommended that it is topped up every 37k miles.

Seems a bit odd, surely it would have been done at it's 75K service it's only done 85k now. Seems a bit crazy you only get a fluid warning when it is too low. and surely it would have come up when it dosed the system when I filled up not after the next restart.

Just fabulous timing if it is with snow on the ground, guess I should have checked it sooner really.

Its expensive so they probably would have notified you if it was to get replaced.

Of course keep in mind that at 85k, your DPF is a ticking bomb, if its not already been replaced its going to need it sooner rather than later

Aftermarket PAT fluid isn't that expensive. I bought some when changing the DPF but never used it, think it was about £20 for the litre...not much compared to the replacement DPF anyway lol.

It won't have been done at a 75k service unless customer specified usually.

20 quid for a litre of fluid, that's still pretty expensive stuff, when I had my DPF "fixed" the garage bought my fluid off me for a few quid, every little helps!

It's not cheap no, but there are much more expensive things that can go wrong lol. With the compo for the whiplash received from that Focus bump he'll be loaded anyway. :P

Cheapest I have found for a litre with the filling pipes is about £40.

Mind you I still convinced that there is a hole through my DPF cermaics will do a run and do some data logging shortly see if I am getting a higher DPF pressure reading.

Not sure what I was thinking of, just checked the Focus spreadsheet and it was indeed £37.75 back in Oct 2014. :o

I should probably find that and sell it lol.

Done a run in the car and it has done a regen, didn't really get hot enough though. Still showing a very low differential pressure around 1kpa maximum.