GPF active cycles?

[dean5125]

as with DPF systems, the GPF will actively regenerate when it needs to. Search for the self study program "SSP 558" if you want to learn more. https://procarmanuals.com/vag-ssp-558-close-coupled-petrol-particulate-filter/

btw - thank you topher, this may well finally answer my original post!

[fredgroves]

any warning lights as suggested early!!

The warning light will be there.... because there are still conditions under which the regen doesn't happen and the filter gets dangerously full...

[monkeyhanger]

as with DPF systems, the GPF will actively regenerate when it needs to. Search for the self study program "SSP 558" if you want to learn more. https://procarmanuals.com/vag-ssp-558-close-coupled-petrol-particulate-filter/

A very interesting document, thanks for the posting.

So it seems an active cycle is every 2000kms, can't say I've noticed mine being done, I guess that's a good thing

I knew it was doing a regen of some sort!! It is very subtle and is nothing more than a slight increase in exhaust volume in my case, with the stereo on I doubt you'd even notice it, no rough idle, no loss of performance for day to day driving or any warning lights as suggested early!!

I would like to just say before the sound of regen cycles start scaring folks, I've had my GTI for about 6 months and it has only done it twice in that time but I put it massively down to my very short work commute, at less than 1 mile I'm guessing this is way from the norm and yes I could walk but I work hard to have a nice car and I'm going to bloody well use it!!! plus it does sound lovely on cold start in the morning!

My Wife's Polo GTI+ has done it just the once, at about 4k miles, and the 33% drop in mpg really stood out. Perhaps with your 1 mile commute, mpg is never a consideration for you as you know it'll be rock bottom when the coolant in your car may not even reach 50C by the time you get to work. There was no warning light when the Polo was doing it's very noticeable regen.

[Jim_mk7.5]

as with DPF systems, the GPF will actively regenerate when it needs to. Search for the self study program "SSP 558" if you want to learn more. https://procarmanuals.com/vag-ssp-558-close-coupled-petrol-particulate-filter/

A very interesting document, thanks for the posting.

So it seems an active cycle is every 2000kms, can't say I've noticed mine being done, I guess that's a good thing

I knew it was doing a regen of some sort!! It is very subtle and is nothing more than a slight increase in exhaust volume in my case, with the stereo on I doubt you'd even notice it, no rough idle, no loss of performance for day to day driving or any warning lights as suggested early!!

I would like to just say before the sound of regen cycles start scaring folks, I've had my GTI for about 6 months and it has only done it twice in that time but I put it massively down to my very short work commute, at less than 1 mile I'm guessing this is way from the norm and yes I could walk but I work hard to have a nice car and I'm going to bloody well use it!!! plus it does sound lovely on cold start in the morning!

My Wife's Polo GTI+ has done it just the once, at about 4k miles, and the 33% drop in mpg really stood out. Perhaps with your 1 mile commute, mpg is never a consideration for you as you know it'll be rock bottom when the coolant in your car may not even reach 50C by the time you get to work. There was no warning light when the Polo was doing it's very noticeable regen.

Reckon mine has probably done it a few times but wasn't really aware it. Just done over 12k miles since it was new June '18 and lots of short commutes recently since we moved - 3-4 miles to the office depending on the route.

[Sootchucker]

I'm still not 100% convinced that my May 2018 (built Apr 18) non PP GTI even has a GPF, even though there is no soot whatsoever on the tail pipes (nor has there ever been). It was my understanding that was one of the reasons why they dropped the 230ps GTI in favour of just the 245ps GTI PP, as just the PP gained the GPF, and that these didn't come on stream until mid 2018.

Is there anyway to definitely check as I've seen photos on the underside where people claim that the front most box (just aft of the crossmember) is the GPF, but I was told that's actually the catalytic converter and that a GPF is actually formed as part of the exhaust manifold near the turbo to get it super hot really quickly.

I must pop the bonnet on mine and have a look around.

[Jim_mk7.5]

I'm still not 100% convinced that my May 2018 (built Apr 18) non PP GTI even has a GPF, even though there is no soot whatsoever on the tail pipes (nor has there ever been). It was my understanding that was one of the reasons why they dropped the 230ps GTI in favour of just the 245ps GTI PP, as just the PP gained the GPF, and that these didn't come on stream until mid 2018.

Is there anyway to definitely check as I've seen photos on the underside where people claim that the front most box (just aft of the crossmember) is the GPF, but I was told that's actually the catalytic converter and that a GPF is actually formed as part of the exhaust manifold near the turbo to get it super hot really quickly.

I must pop the bonnet on mine and have a look around.

I had a facelift 2017 230ps DSG which farted and sooted up the tailpipes after only a week or so of driving. Guess if yours are soot-free then maybe has one.

[Grahamt]

as with DPF systems, the GPF will actively regenerate when it needs to. Search for the self study program "SSP 558" if you want to learn more. https://procarmanuals.com/vag-ssp-558-close-coupled-petrol-particulate-filter/

A very interesting document, thanks for the posting.

So it seems an active cycle is every 2000kms, can't say I've noticed mine being done, I guess that's a good thing

I knew it was doing a regen of some sort!! It is very subtle and is nothing more than a slight increase in exhaust volume in my case, with the stereo on I doubt you'd even notice it, no rough idle, no loss of performance for day to day driving or any warning lights as suggested early!!

I would like to just say before the sound of regen cycles start scaring folks, I've had my GTI for about 6 months and it has only done it twice in that time but I put it massively down to my very short work commute, at less than 1 mile I'm guessing this is way from the norm and yes I could walk but I work hard to have a nice car and I'm going to bloody well use it!!! plus it does sound lovely on cold start in the morning!

My Wife's Polo GTI+ has done it just the once, at about 4k miles, and the 33% drop in mpg really stood out. Perhaps with your 1 mile commute, mpg is never a consideration for you as you know it'll be rock bottom when the coolant in your car may not even reach 50C by the time you get to work. There was no warning light when the Polo was doing it's very noticeable regen.

I'm surprised you can see such a significant fuel decrease as from what I understand no additional fuel is used to regenerate these petrol filters......the above posted vw document doesn't actually say how it regenerates but I did read on a Mercedes document that basically said the timing is retarded to generate an oxygen rich atmosphere to allow combustion to take place.

[Sootchucker]

I had a facelift 2017 230ps DSG which farted and sooted up the tailpipes after only a week or so of driving. Guess if yours are soot-free then maybe has one.

Well I had a look under the bonnet at lunchtime, but because of the shrouding around the turbo, I couldn't really see much. Guess the only way to have a real look is with the car up  on ramps ?

[dean5125]

I had a facelift 2017 230ps DSG which farted and sooted up the tailpipes after only a week or so of driving. Guess if yours are soot-free then maybe has one.

Well I had a look under the bonnet at lunchtime, but because of the shrouding around the turbo, I couldn't really see much. Guess the only way to have a real look is with the car up  on ramps ?

To me it sounds like you have a GPF if you always have clean exhausts! and am I correct in thinking the loss of DSG farts was purely because of the GPFs?!? but I'm guessing your in a manual Sootchucker?

[dean5125]

Short of DSG Sootchucker, that's a hell of a spec list on yours!!