I have an issue with my 2.0 TDI. It performs a DPF regen every 50 miles or so which is happening almost every day now. There are no fault codes with the car and it drives perfectly. I did notice that when I checked the capacity with VAG DPF  it was stating 49% full. 2 minutes later a regen started and when I checked VAG DPF it was showing as 100% full. Not sure what would cause a jump of capacity of almost 50%. 

Anyone any ideas what maybe going on?

 

Your gas temperatures look very low - mine are showing higher than that for normal use and especially for regen

Have a look on  YouTube Search ORiley DPF

Have you got VagDPF set to live data, otherwise it doesn't update every few seconds.  Did you set Vagdpf to your specific engine code?

 

Temps as legacy said look quite low for any form of regeneration to happen, you need 300c for a passive regeneration and an active regeneration triggers the temp up to 600c.

 

Need screenshots from the actual app if available as it shows a lot more data, the ash levels will help.

Edited 12 February, 20242 yr by globalste

Did you ever get to bottom of this I have simular with my octavia but mine is constantly regenerating when upto temperature 

Have you any more photos as that isn’t currently regenerating and it’s not live logging.  Oil Ash is high(ish)

Edited 1 June, 20242 yr by globalste

Was told when dpf is red at top it's under regen also I can get out the car and soot is a say 6 fan stays on for few min then get back in the car a hour later soon as car warms up soot rockets too 20+ in blink of a eye then slowly comes down 

This is today 1 after iv been on 45min trip and below 2g soot but still in regen and when got out fan stayed on then got back in drove about 10min and soot shot up too 22g so unsure

Oil ash has to be measured in volumetric units.

For 2.0 the factory threshold is around 0.18l.

It is difficult to give a solid answer because the screenshots are from different days etc.  the easiest way to see it is see a before journey, during and after journey screenshot.  It sounds like at first the car is sensing a differential pressure across the dpf and triggering an active regen as seen by the pre and post injection and the temperatures.  However, if you’re doing short trips (<10miles) the car will try to finish the last regeneration once it gets up to temperature.  

Just a thought, Did you check the vehicle engine code etc on VAGDPF?

12 hours ago, globalste said:

 

This is before then about few min in then about half way then when pulled back up as can see soon as dpf warms up it's in constant regen then when I turn car off the fan carries on for about 3-4min

Also made sure app is setup too correct engine code etc

The thing with VAGDPF is it uses a calculated soot mass but the car also measures actual soot loading, when the car reads the higher loading it triggers the regen and so the calculated figure jumps.  You’ve also got a high differential pressure when the dpf is empty, and the car has done 140k, so I’d say from that your DPF has started to reach its ash loading maximum.  So you’re likely looking at a dpf clean or a replacement, the clean is cheaper.

Been mentioned about gutting it and get it mapped out so weighing up my options but thanks for the help 👍🏻

Out of curiosity what is the normal dpf differential pressure??

On 04/06/2024 at 07:27, Derbylad82 said:

Out of curiosity what is the normal dpf differential pressure??

 

Mine shows between 0.7 hPa and 3.6 hPa in normal use and over 7 hPa when regenerating

Mines in constant regen when warmed up so makes sense 

What I find weird is it I do a short journey and fan running when I get back in the soot level say 14g is the same and stays that way till warmed up then slowly comes down but if I go on long journey and soot level is st 2g and get out fan is still running then when get back in after few min soot level rockets too 20g+ then when warmed up comes down slowly 

Have you used vcds to monitor? Whatever you’re using could be misleading and inaccurate.

 

vcds is expensive and usually for a reason, it’s just better

 

With vcds I believe you can force a regen, then go on the motorway at night, stick it in 3rd or 4th so the revs over 2k for 15minutes then it should do its thing.

 

Also are you getting the dpf light on your dash? If not I’m sure I read on here some folk had fan constantly running after a drive and thought it was DPF but it was actually a duff relay

Got access to vcds and shows pretty much same results it's constantly in regen soon as warm don't matter the soot level that's the issue I know the ash level is kinda high about 75% heard mentioned could be glow plugs as engine isn't warming up properly but no dash lights and no fault codes with vcds 

2 hours ago, Legacy said:

 

Mine shows between 0.7 hPa and 3.6 hPa in normal use and over 7 hPa when regenerating

You're making me nervous now. My differential pressure is 32hPa recently after a regen. Mine does seem to regen more than my previous car, A4 2009 2.0 Diesel (no adblue, that used to do it every 2nd tank of fuel. Now it feels like twice or three times a tank in the Superb(adblue).

Is this normal ?

59 minutes ago, defsix said:

You're making me nervous now. My differential pressure is 32hPa recently after a regen. Mine does seem to regen more than my previous car, A4 2009 2.0 Diesel (no adblue, that used to do it every 2nd tank of fuel. Now it feels like twice or three times a tank in the Superb(adblue).

Is this normal ?

Mine regens roughly every 250km/155 miles.  I get (very roughly) 1000km to a tankful so that's four regens per tankful on a mix of rural/motorway running.  Mine's a 2021 model but it definitely regens a lot more than any other diesel that I've had.  For some reason, it uses a lot less AdBlue as well.

Ah so I'm not the only one! And you have a much lower pressure differential. Maybe it's the difference between distance after a regen?

5 minutes ago, defsix said:

Ah so I'm not the only one! And you have a much lower pressure differential. Maybe it's the difference between distance after a regen?

 

I would be concerned about the oil ash residue percentage figure - I've seen mention of 80% being the limit so if you feel that you're having too frequent regens and your fuel consumption isn't great, it might be because the DPF doesn't take long to go from 'empty' to 'full' in terms of soot because it's already holding a lot of ash.  If I were you, I'd keep a very close eye on it and consider getting the DPF cleaned (after getting proper, professional advice - I know very little about these things).  All that said, the VAG DPF is very sensitive to engine code and you can get strange readings if it's not the correct one. 

 

Here's a similar post: https://www.briskoda.net/forums/topic/442991-dpf-questions-i-know/

 

The consensus seems to the VAG DPF is usually spot on, once you have the correct endgine code.

I'll drive on for now, I've a fairly clean run to work and back so never had DPF issues before. I'll just keep an eye on it. 

You've put my mind to rest about the regular regens though for now 😁