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Driveway moment: how long does a regeneration take?

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phil keegan

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49
Location
Newcastle
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T6 Coast 150
I’m still on my first tank of diesel in a new Coast. After a long day (4am-6pm) mainly at work I pulled into our drive and suspected a regeneration was occurring (higher idling revs, start/stop not activating). I sat there with the engine running wondering how long a regeneration might take to complete. Eventually impatience/fatigue got the better of me (I’m not very patient) and I turned the engine off and went inside (to a waiting G&T). My question is to those who try not to turn the engine off when a regeneration is occurring/suspected is how long might a ‘driveway moment’ take in these circumstances? Thanks for your advice.


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Perfectos

Perfectos

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I’m still on my first tank of diesel in a new Coast. After a long day (4am-6pm) mainly at work I pulled into our drive and suspected a regeneration was occurring (higher idling revs, start/stop not activating). I sat there with the engine running wondering how long a regeneration might take to complete. Eventually impatience/fatigue got the better of me (I’m not very patient) and I turned the engine off and went inside (to a waiting G&T). My question is to those who try not to turn the engine off when a regeneration is occurring/suspected is how long might a ‘driveway moment’ take in these circumstances? Thanks for your advice.


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Duration is not a fixed duration, but generally I experience anything from 10 minutes to Twenty five minutes for a Regen .
if you do decent mileage don’t worry about it, next time you start up and the engine gets to temperature it will regen over the journey.
problems only occur when multiple regenerations fail to complete
 
chockswahay

chockswahay

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Scotland
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T6.1 Coast 150
We’ve done 3000 miles in ours now (18k on the clock) and I have never been aware of a regen once :oops:

My sons T6 Kombi seems to regen on the drive every other day

Mine is doing a regen …….. isn’t it? o_O
 
Lambeth Cali

Lambeth Cali

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London
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T5 SE 174
We’ve done 3000 miles in ours now (18k on the clock) and I have never been aware of a regen once :oops:

My sons T6 Kombi seems to regen on the drive every other day

Mine is doing a regen …….. isn’t it? o_O
I‘ve never noticed it. I’ve had mine 13 years. Would I notice slightly higher revs? Sometimes the bonnet feels very hot!? Whenever I get out I am knackered and have to unload for half an hour.

The regen ideally/normally happens when you’re on a drive, so you probably wouldn’t notice. The “It always happens on the drive” was a joke!
 
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WelshGas

WelshGas

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We’ve done 3000 miles in ours now (18k on the clock) and I have never been aware of a regen once :oops:

My sons T6 Kombi seems to regen on the drive every other day

Mine is doing a regen …….. isn’t it? o_O
Maybe maybe not. What year is the vehicle?
 
ArunAlec

ArunAlec

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6years and never heard mine fire up! But, we only ever do longish trips, normally involving a good bit of motorway. Hardly ever do short stop/start trips.
 
WelshGas

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MY2020 2 years old now
An OBD module, like Carista will tell you if regeneration are taking place and the status of the DPF..
Make sure you run with a minimum of 1/4 tank for only short periods. Running with low fuel levels constantly stops regeneration.
 
chockswahay

chockswahay

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Scotland
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T6.1 Coast 150
An OBD module, like Carista will tell you if regeneration are taking place and the status of the DPF..
Make sure you run with a minimum of 1/4 tank for only short periods. Running with low fuel levels constantly stops regeneration.
Thanks @WelshGas, we run the van from full to low then always back to full each time (old habits) and also rarely do short journeys. I like the idea of an OBD module:thumb
 
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phil keegan

Messages
49
Location
Newcastle
Vehicle
T6 Coast 150
An OBD module, like Carista will tell you if regeneration are taking place and the status of the DPF..
Make sure you run with a minimum of 1/4 tank for only short periods. Running with low fuel levels constantly stops regeneration.

Thanks - very helpful. My van came with Edition 11.2021 of the owner’s manual. Page 301 has a page on this issue and refers to buttons for postponing and starting regeneration in the centre console. I assume this will be a feature appearing in newer vans to help address this problem but hasn’t made it into a Coast delivered on 9/6/22.


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Stu@rt

Stu@rt

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Kent
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Does the regen not carry on once the ignition has been turned off?
My understanding is that the process is setting fire to expensive diesel in a bid the burn the soot out of the DPF. Crazy high temps....600-700 Celsius, so when the process gets interrupted by you switching off those fans kick in to bring those sky high temps back down as a safety precaution
 
Perfectos

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Does the regen not carry on once the ignition has been turned off?
The regen works by over fuelling on the Exhuast stroke, the un burnt fuel enter the DPF where it ignites and burns off the built up carbon, thus cleaning the DPF. Sensor front and rear record / measure the difference in carbon and trigger the Regen until both sensor read approximately the same. (Hence duration of regen is not a fixed duration)

when you switch off the engine, the fuel stops as does the engine, so the Regen process stops.
 
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