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      01-20-2020, 03:01 PM   #3
Johnny Grabble
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Drives: 530d
Join Date: Dec 2013
Location: Cheshire UK

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Quote:
Originally Posted by Salop67 View Post
Got a new 530 d which I am delighted with except for one thing.
I have just returned from a 100 mile round trip and on reaching home and turning off the engine the cooling fans were running and I could smell that a forced regeneration was going on.
My understanding is that the dpf cleans itself when running at high speed(motorway) and it is only when the dpf becomes blocked after a lot of short journeys that extra fuel is injected into the dpf and a forced regeneration occurs.
Why would the car start a forced regeneration towards the end of a lengthy and mostly fast(over 60 mph) journey?
I thought it would be useful to ask on here before a trip to the dealer. I guess they will tell me there is nothing wrong with it.
My 530d does that sometimes, perhaps 1 motorway trip in 20 or 30 (none of my motorway trips are less than 60 miles). Also had it do it 12 miles after a cold start.
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