Just after doin a short run i have noticed my fan has stayed on for a good 5 min after stopping the car? Sometimes this happens sometimes it doesnt? How come just after a short run its on but some longer ones it doesnt seam too stay on? Also noticed alot of heat commin from within the rear arch passanger side. I could feel it when getting my little boy out. It is the side of the exhaust but never noticed it before?

Sounds like it could just be a DPF regen to me.

 

Phil

Really? What the fan staying on? Wouldnt this come up as a light on dash?

No Phil's right. It's the regen doing its stuff. 

Really? What the fan staying on? Wouldnt this come up as a light on dash?

you don't get any lights with a normal active regen. If your tickover is higher than usual circa 1000-1200 rpm at normal operating temperature its a sure sign a regen is going on. The reason the fan comes on is because you have interupted the regen before it was completed and because the ecu has increased the operating temperature of the dpf to burn off the collected soot it now has to cool it down to prevent any fire risk. If you do a regen search in either mk2 or 3 octy sections there's many threads on the issue. If you go to skodas website there's a briefing on it here.

http://www.skoda.co.uk/owning-a-skoda-faqs

The light only comes on if it needs the driver to help it do a regen.

 

Phil

http://www.natef.org/NATEF/media/NATEFMedia/VW%20Files/2-0-TDI-SSP.pdf

The various stages of regen are covered here from around page 57 on.

Ah right thanks for that. So this is normal then? It regens every now and again? Its not a sign of a problem?

How often does it do it?

It's completely normal mate. Most times the dpf does it's thing without you even noticing it - it'll do 1 when the soot level has built up to a set level or it's done around 600 odd miles since the last 1 whichever comes 1st. Last 1 I noticed was before christmas when I got home at about 11pm to notice the tickover high. A quick reverse off the drive and a nice 10 mile run sorted it and the tickover went back to normal so job done. Mine has done a few since, its just that it did so while I was doing a long enough journey not to notice. The time you have to be careful is if you're only doing short runs and it does this repeatedly each time you switch the ignition off as its a sign its repeatedly failed to complete the task. The next stage would be the dpf light coming on and if you don't complete the cycle after that it's limp mode.......

Cheers for that. Ill take note. I never knew all that

I noticed mine doing this when I parked at work a while ago, did not know what was happening just stood and waited for it to stop. The next time I hear the fan running I will smile.

It does explain it all in the manual...but then, like me you're a bloke....

Things are a lot easier to understand, when someone tells you, than when you read it.