Dpf regen soot

**mattyk** · 22-08-2019,08:34 PM

What’s the difference between soot measured and calculated
I have been having my car doing regen it went away and stopped reving a little while ago then come back I drove at 40/50mph air con on 2500 rpm for 15/20 mins a couple of trips before when I scanned it was at 18.00g now it’s down to 8.01g on the calculated and -2.26 on the measured
What is the good soot levels is it as low as possible

Cheers Matt

**Crasher** · 22-08-2019,09:30 PM

18 is about normal for coming upto regen, 8 is fine. Doing a forced regen I like to see it go down to zero but when you come back to it later it has usually gone back upto around 4%.

**mattyk** · 22-08-2019,09:39 PM

Ok cheers I done a forced and it didn’t drop at all as it was doing it for 40 mins Seems I have managed to get it lower with the driving regen 3/4 gear In manual 2500 rpm around 40/50mph for 15 mins etc
Haven’t yet tried a vcds driving regen though

I have noticed these multitronic gearboxes it’s never going to regen itself as the revs are always so so low

Cheers Matt

**Crasher** · 24-08-2019,12:34 PM

Fit a new GENUINE DPF pressure sensor, calibrate it, clear the learnt adaptations (NOT THE ASH MASS!) and do a forced regen, sometimes there is a good on screen function (sometimes the glory of a standing regen where you can go have a coffee) but quite often in VCDS it is a bit of a hit and miss guessing game such as changing the stored value to 00 01 and seeing if the DPF light comes on.

**mattyk** · 24-08-2019,12:42 PM

I will contact Audi get a price on the pressure sensor it looks pretty easy to change . Think it’s the calibrating it will be difficult ?
Yesterday I plugged the laptop in went to regen while driving change 0 to 1 and it come up with yes no cancel
I clicked yes and said about changing numbers to 1234 etc
Dpf warning light come on I then drove temp got up soot was coming down but traffic slowed to much need to do it On a quiet time .
I tuned car off back on Dpf was back off again
Cheers Matt

**mattyk** · 25-08-2019,01:34 AM

Tonight I was having a drive and was in sport mode and giving it some beans and when I got to a slow area went back to drive and the car was doing the reving at 1400rpm when coming to a stop . This is what I think is the regen process
Would this be the sensor causing it as it’s on soot measured is -2.26 g

Cheers Matt

**Crasher** · 25-08-2019,05:57 PM

There is actual and measured.

**mattyk** · 25-08-2019,06:03 PM

Mine is calculated 8.10g
And measured is -2.26

**mattyk** · 25-08-2019,06:05 PM

From what I have been told on vcds it’s measured that’s the differential pressure sensor messurement and calculated what the ecu thinks is in the Dpf

I’m thinking bring -2.26 the sensor isn’t working