Just before i ring Skoda and look like a complete muppet i thought i might ask the question on here.

Sometimes not every journey, when i complete my journey and get out the car the cooling fans are running at full blast making the car sound like its about's to take off. This runs for at least 10 minutes. Its only happened about 5 times so far since getting the car and wierdly it seems it happens when i have had the internal fans running. (not A/C).

In fact today i had a phone call from someone at work asking me if i'd left my engine running in the car park!! (made me check for my keys...) :S

Never having an Octy before i was just wondering if anyone else had the same thing. Or if this is completely normal to cool the turbo or something down.

Facelift Octy VRS 2.0 CR TDI MY12

Any help greatly appreciated

Just before i ring Skoda and look like a complete muppet i thought i might ask the question on here.

Sometimes not every journey, when i complete my journey and get out the car the cooling fans are running at full blast making the car sound like its about's to take off. This runs for at least 10 minutes. Its only happened about 5 times so far since getting the car and wierdly it seems it happens when i have had the internal fans running. (not A/C).

In fact today i had a phone call from someone at work asking me if i'd left my engine running in the car park!! (made me check for my keys...) :S

Never having an Octy before i was just wondering if anyone else had the same thing. Or if this is completely normal to cool the turbo or something down.

Facelift Octy VRS 2.0 CR TDI MY12

Any help greatly appreciated

I've have had this once so far. Seems normal, not sure what it's doing though. I'm sure someone more knowlegable will inform us both shortly.

I had to show the wife the car when it was doing this as I know she'd only get confussed if she took the car out on her own & it did the same with her. I can just imagine the phone call. 'Dear i've taken the keys out & the engine is still going, what do I do ?'

Edited 23 June, 201115 yr by HWMBO - Mark

It is the DPF doing it thing to clear the soot. You switched the engine off mid point so the cooling fans run to cool down the system as it is injecting diesel into the exhaust making it very hot.

Its all fine and normal and will resume the burn off on the next journey.

It is the DPF doing it thing to clear the soot. You switched the engine off mid point so the cooling fans run to cool down the system as it is injecting diesel into the exhaust making it very hot.

Its all fine and normal and will resume the burn off on the next journey.

Interesting, How often does this process go on during a long drive then or is it once every few hundred miles ? Excuse my ignorance towards the DPF.

Interesting, How often does this process go on during a long drive then or is it once every few hundred miles ? Excuse my ignorance towards the DPF.

Whenever the ecu tells it to depends on the driving you do. A lot of short journeys where the engine doesn't get fully warm, it will happen more often. I have had it twice on mine in 14 months.

Happens on my Superb too. Past 2 days I have got home from work, turned the engine off and I thought a plane was flying overhead. Got out of the car and realised it's the fan going full tilt. Probably not the right thing to, do but if you start the engine again for about 15 seconds then turn it off, that seems to stop it. Tell me off if I'm breaking my car!

its happened on mine once after a short journey and it did get me wondering why so thanks for answering that question!

It is the DPF doing it thing to clear the soot. You switched the engine off mid point so the cooling fans run to cool down the system as it is injecting diesel into the exhaust making it very hot.

Its all fine and normal and will resume the burn off on the next journey.

Don't you get a light on the dash when the DPF regen is running? I've had this once on my Scout, light comes on to tell me I have to drive at 60mph in fifth for a few minutes constant to generate enough heat whilst the DPF burns off the soot. This shouldn't happen very often though unless you have a very heavey right foot.

Don't you get a light on the dash when the DPF regen is running? I've had this once on my Scout, light comes on to tell me I have to drive at 60mph in fifth for a few minutes constant to generate enough heat whilst the DPF burns off the soot. This shouldn't happen very often though unless you have a very heavey right foot.

Yes that is when it is regen'ing and not doing a normal burn off.. The light comes on when the DPF is too full for a normal burn off and forces you to drive the car at a pace to heat it up enough.

...Also don't you mean a very light right foot? :wonder:

It is the DPF doing it thing to clear the soot. You switched the engine off mid point so the cooling fans run to cool down the system as it is injecting diesel into the exhaust making it very hot.

Its all fine and normal and will resume the burn off on the next journey.

SO SO SO glad I clicked on this thread and read this post when this happens to my car I will not lay an egg on the drivers seat now cheers

I've noticed the fans too when I arrive at work. Usually when I've been driving like a pensioner.

Is the water pump electric or belt driven off the lump ?

Does it also run with the fans after ignition off ?

Last car I worked on was a Leyland Mini 850 !

I've noticed the fans too when I arrive at work. Usually when I've been driving like a pensioner.

Is the water pump electric or belt driven off the lump ?

Does it also run with the fans after ignition off ?

Last car I worked on was a Leyland Mini 850 !

Belt driven. The fans run full blast as all they are doing is trying to cool the exhaust system and not the engine. You can also sometimes smell burning with it.

Yes that is when it is regen'ing and not doing a normal burn off.. The light comes on when the DPF is too full for a normal burn off and forces you to drive the car at a pace to heat it up enough.

...Also don't you mean a very light right foot? :wonder:

This just shows my ignorance, I didnt know the DPF did anything between regen's. Doesn't the burn off adversly affect fuel economy? I haven't noticed anything to suggest my Scout is doing a burn off and I've never noticed the fan running when the engine is stopped, although it has done one regen in the 18 months 25k miles I've had it.

...And surely it is a heavey right foot that causes the DPF to fill up with soot?

i've only done 1070 miles in my car from new, i've been driving it conservatively since i got it to allow the engine to bed in (appart from the odd blip of power here and there.)

i wouldn't have expected the DPF to kick in 4-5 times already on this kind of distance. Also i after reading the manual it does confirm the DPF light should come on when performing a cleaning cycle, which in my case did not.

Maybe just cooling from doing a stop start journey and not getting enough cool air through the engine at speed.

i've only done 1070 miles in my car from new, i've been driving it conservatively since i got it to allow the engine to bed in (appart from the odd blip of power here and there.)

i wouldn't have expected the DPF to kick in 4-5 times already on this kind of distance. Also i after reading the manual it does confirm the DPF light should come on when performing a cleaning cycle, which in my case did not.

Maybe just cooling from doing a stop start journey and not getting enough cool air through the engine at speed.

well im at 3500 miles now and its not happened at all that im aware of and ive done a fair bit of start stop small trips when its been 30-35DegC outside does sound strange that youve had it so much

i've only done 1070 miles in my car from new, i've been driving it conservatively since i got it to allow the engine to bed in (appart from the odd blip of power here and there.)

i wouldn't have expected the DPF to kick in 4-5 times already on this kind of distance. Also i after reading the manual it does confirm the DPF light should come on when performing a cleaning cycle, which in my case did not.

Maybe just cooling from doing a stop start journey and not getting enough cool air through the engine at speed.

What you would also notice is that the engine will be idling at a higher speed if the car has detected a build-up in the DPF. Basically, extra fuel is being injected to increase the exhaust temperature to burn the soot off, hence the fans also running to cool things down.

The light only comes on if the level of soot has built up beyond a certain level (detected by the level of back pressure in the exhaust). If this has happened, increasing the idle level alone will not clear out the DPF, therefore the advice to drive at steady speed at elevated RPM (I think it is above 2300).

Driving gently, and not getting the engine warm, and booting the car around can cause a soot build up (try following a non-DPF equipped diesel when they floor it). You really need some steady speed runs at above 2300 RPM to clear it out.

This just shows my ignorance, I didnt know the DPF did anything between regen's. Doesn't the burn off adversly affect fuel economy? I haven't noticed anything to suggest my Scout is doing a burn off and I've never noticed the fan running when the engine is stopped, although it has done one regen in the 18 months 25k miles I've had it.

...And surely it is a heavey right foot that causes the DPF to fill up with soot?

A heavy right foot may make more soot but it also keeps the DPF nice and warm. This will enable it to burn off the soot and hence keep itself clean. A light right foot or ecomony driving at slower speeds creates less soot but the DPF will not get warm enough to burn off this soot. Hence it will fill up and then force itself to regenerate.

its the fans cooling the turbo down.

if u drive it hard just before u switch the car off, u'll hear this often.

common with turbo cars. if the turbo is not cooled down, the turbo manifold will crack, costing u lots of $$$ to replace.

hence the cooling kickin in.

i used to get it occassionally, till i learnt not to drive agressively the last few kms of my journey.

sometimes it doesn't have to b hard driving, hot days can have the same effect.

Edited 24 June, 201115 yr by JR RS

its the fans cooling the turbo down.

if u drive it hard just before u switch the car off, u'll hear this often.

common with turbo cars. if the turbo is not cooled down, the turbo manifold will crack, costing u lots of $$$ to replace.

hence the cooling kickin in.

i used to get it occassionally, till i learnt not to drive agressively the last few kms of my journey.

sometimes it doesn't have to b hard driving, hot days can have the same effect.

That might be why I've never experienced this then as I have always conscientiously idled the engine for a minute or so before stopping the engine (As you are advised to do with any turbo charged engine particularly after long journeys or heavy acceleration) to prevent any damage to the turbo (I know of at least one person who didn't follow this advice and ended up needing a new turbo after 3 years on a VW Transporter).

Many car modder's even fit a device to automatically idle the engine for a period of time determined by the previous driving style, when the ignition is cut.

Just to throw something else into the mix, The village I live in is at the top of quite a big hill and I have previously noticed quite a few cars arriving with the cooling fans running as a lot of cars these days seem to run quite a narrow coolant temperature range.

its the fans cooling the turbo down.

if u drive it hard just before u switch the car off, u'll hear this often.

common with turbo cars. if the turbo is not cooled down, the turbo manifold will crack, costing u lots of $$$ to replace.

hence the cooling kickin in.

i used to get it occassionally, till i learnt not to drive agressively the last few kms of my journey.

sometimes it doesn't have to b hard driving, hot days can have the same effect.

no it is the dpf that needs cooling down. Mine done it after about a 2mile journey so the engine wouldn't even be hot.

no it is the dpf that needs cooling down. Mine done it after about a 2mile journey so the engine wouldn't even be hot.

so how would u explain it on my "non-diesel" tsi engine which doesn't have a dpf?!?!?!

i said "turbo" needs cooling, not the "engine".

the turbo spins at very high rpm, and as a result the turbo manifold gets hot. doesn't matter how far or close u drive, the turbo will spool a number of times. each time it spools, the turbine spins, causing friction, causing heat, meaning a hot turbo manifold.

i'm guessin u haven't spent much time around turbocharged cars. they do it all the time.

so how would u explain it on my "non-diesel" tsi engine which doesn't have a dpf?!?!?!

i said "turbo" needs cooling, not the "engine".

the turbo spins at very high rpm, and as a result the turbo manifold gets hot. doesn't matter how far or close u drive, the turbo will spool a number of times. each time it spools, the turbine spins, causing friction, causing heat, meaning a hot turbo manifold.

i'm guessin u haven't spent much time around turbocharged cars. they do it all the time.

I'm guessing you haven't spent much time around turbocharged diesel cars then. In 8 years of owning them I have only had the fan on once when I have switched the engine off and it was only for about 1min.

The dpf cool down lasts around 5-10 min and has happened twice on mine, once as I said when the engine or the turbo couldn't have been warm.

I'm guessing you haven't spent much time around turbocharged diesel cars then. In 8 years of owning them I have only had the fan on once when I have switched the engine off and it was only for about 1min.

The dpf cool down lasts around 5-10 min and has happened twice on mine, once as I said when the engine or the turbo couldn't have been warm.

i missed the bit about "5-10" mins in the openin post. the turbo cooling doesn't go for that long, so it would have to be the dpf, as u and the others mentioned already.

my bad....i got it wrong.

i missed the bit about "5-10" mins in the openin post. the turbo cooling doesn't go for that long, so it would have to be the dpf, as u and the others mentioned already.

my bad....i got it wrong.

haha no worries...

MY CAR DID THIS TODAY so so glad I read this thread lol wasnt overly loud though and I was parked in a large garage to clean car wasnt overly hot either had just got it to temp don a short crapy drive 10 miles max and its all ive been doing all week short lil trips just shy of 3600 miles first time ive heard it