Quote:
Originally Posted by Salop67
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.
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Not sure how the latest DPF strategy is working in all conditions. Could simply be the EGU had decided the soot loading was too high and triggered an active regeneration.
I know when I had my 330d, I had that sort of thing happen. One occasion I'd driven over 100 miles, and about a mile before I got to my hotel, went into a regeneration. Knew it before I stopped, sure enough the exhaust was hot and giving off the evidence. Next day, once heated up, it continued the regeneration.
I thought at the time, why didn't it make a passive regeneration during the run? Conditions obviously weren't met, and it required an active regeneration.