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Discussion Starter · #1 ·
Hi, my first post
Just returned from a short drive approx 5 miles and as I got out of the car I could hear the radiator fan running and could smell that the engine was hot, this has happened 2 days on the trot. Checked the coolent level - just above min. Before I contact the dealer is this normal? I have only covered 1200 miles to date and really like the car
 

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It's a DPF regen that has been interrupted. Nothing to worry about.
 

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Discussion Starter · #3 ·
Thanks, Andyvee for the info I will take the car on a a 60 mph run for 20 or so miles, hopefully that will do the trick, shame something doesn't come up on the infotainment screen to give early warning that the filter is getting sooted up, Thanks again for your reply!
 

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andyvee said:
It's a DPF regen that has been interrupted. Nothing to worry about.
Hi Andy - does this mean that when the radiator fan continues to run after a gentle drive on a cool day, it's likely that the DPF is regenerating and consequently the car is in need of a fast motorway spin?
 

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The times when you had to take your diesel for a highway spin to regenerate your DPFs have gone forever...

In Kodiaq, the soot burning procedure in the DPF (regeneration) is surprisingly intelligent and does not pose any problems even on short routes. Automatic regeneration starts when soot mass reaches a value of approx. 24 g. Then DPF heats up to 600-700 °C and begins to burn soot to a level of approx. 4-6 g. Interestingly, this process can start just after starting the engine and at low speeds or even when stationary, and it takes approx. 10-15 minutes. If the engine is shut down and the process interrupted, nothing is happening - it is easy to recognize such situations when after leaving the car the fan is still running at full speed - it cools the engine and turbo which are responsible for initiating conditions favorable for burning the soot, i.e. high temperature. After restarting the engine, the process is resumed until the soot is burnt to a proper level.

Therefore, it is unnecessary to drive your Kodiaq on the motorway at a constant speed, in 4th gear, at 3000 rpm to burn out the DPF, like old diesels before.

I have 12km to work, which takes me about 15 minutes with an average speed of 30-40 km/h. Initially, I was afraid that commuting to work on such short distances would kill the particulate filter. My fear turned out to be unjustified - DPF can carry out the whole regeneration process during even such a short route. I very often monitor the (calculated) mass of soot and burning process by the OBDeleven application.

Below please find the screen shots showing two situations: normal driving and DPF regeneration:



 

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Thanks BikeBert, great to know!
 

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Cheers Bikebert. Does this mean that mpg will be lower when regeneration occurs?
 

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Marinfullsuss said:
Cheers Bikebert. Does this mean that mpg will be lower when regeneration occurs?
Yes but probably it's not a significant difference.
For example, when regeneration occurs, RPMs are slightly higher while the car is stationary to keep the DPF temperature hight.
 

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Bert,
this was in reply to a What Car article regarding Karoq Vs Yeti.
Is this news to you? Not being an oil-burner, I know virtually nothing about DPFs.
The 'Oilyboys' amongst us might be interested if you can comment on the What Car statement below.
Thanks.

From Yeti forum.
Having read the What Car? review which Colin posted there is an option there that gives a review of a used Yeti which said this -

Other potential problems with DPF-equipped models arise if the car was shut off part way through a regeneration. The result is contamination of the oil system with fuel, which leads to the oil level rising gradually over time. This can cause damage to the engine, so it's worth getting the car checked out.

This is news to me. Is this correct?
 

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One reply from the very knowledgeable Yeti forum Mod.

Moderator Group
Joined: 16 Sep 2011
Location: Berkshire

My daughter in law has this problem with her S Max, so yes it is a real risk to the engine. She has had the car go into limp mode twice due to the degradation of the oil by diesel. So anyone who has frequent interrupted regenerations would do well to change their oil. A job which is easily done either with a vacuum pump or the electric pump recently sold by Lidl.
Hampshire and Berkshire 4x4 response "Classic" Aqua Blue 140 BHP Elegance 4x4
Park assist,RRP,Spare Wheel and YOC sticker.
 

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Colin Lambert said:
Bert,
this was in reply to a What Car article regarding Karoq Vs Yeti.
Is this news to you? Not being an oil-burner, I know virtually nothing about DPFs.
The 'Oilyboys' amongst us might be interested if you can comment on the What Car statement below.
Thanks.

From Yeti forum.
Other potential problems with DPF-equipped models arise if the car was shut off part way through a regeneration. The result is contamination of the oil system with fuel, which leads to the oil level rising gradually over time. This can cause damage to the engine, so it's worth getting the car checked out.
Colin,
No such problem with my oil-burning Kodiaq. On the other hand I do not follow Skoda's stupid recommendations for changing oil every 2 years or 30.000 km. I changed oil after 6.000 km and then plan to do it every 15.000 km.
 

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Bert,
As an ex Shell Retail Lubricants specialist I concur completely.
I don't care how oil science has improved in the years since I left, 2 years is ludicrous (IMHO) at the average 12k miles a year even for fully synthetic.
Even one year makes me cringe, but since I only do 6k a year, and change my car between 12-24 months I am prepared to stick to that.
Apart from that, as a 'poor old pensioner' £65 for a sump full makes me cringe even more!! Specially when it is the 'bung 'ole blender' specialist Castrol. My biggest competitor for 21 years! :twisted: :lol:
 

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I have a similar problem
I started my kodiaq from cold drove about 20 miles (motorway)
And the engine over heated
I turned the engine off for literally 2 minutes
Re started the car and it ran fine for the rest of my trip (over 100 motorway miles)

It has done this twice now
Yesterday afternoon and again this morning
After this morning I have driven over 300 motorway miles without a problem

Any ideas?
 
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Previous posts have been for fan running after car is stopped due to dpf regen not overheating.
Is it the engine overheat stop warning that came up. Have you checked your coolant level?
As it's happened twice you'd best get it checked at dealer in case it's something serious.
 

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Hi,
Have had the same problem with my kodiaq while towing the caravan.
Alarm sounded and screen went red with a warning of overheating ,check coolant and to stop.fearing a burst radiator,having looked at the reservoir, noticed water had ran down side where reservoir was.also fluid in reservoir was empty. Called out green flag,mechanic said it looked like possible fan failure or blockage,filled up reservoir,ran it for 30 mins and it never flattered.was advised to run it with air condition on all the way home so both fans would work,which did the trick.
Booked it in to dealer,Delved the internet afterwards and found within the VAG group,this was a common problem,and the cause be an AIR LOCK IN THE SYSTEM.this is happening quite a lot to skoda, Volkswagen cars.
on having the dealership look at the car,they said the cause was a AIRLOCK,and they completely drained and refilled the system.have had no bother since!!!,but on asking , could it possibly happen again....mmmmmm...wouldn't commit themselves,but didcsay it seemed to be a problem
 
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