How do I know when the DPF on my car is regenerating?

I read a lot about diesel DPFs but how do I know when the fuel system is regenerating? I drive a Toyota RAV4 2.2-litre diesel. Nothing comes alight on the dash board and only once did I smell hot oil?

Asked on 3 September 2018 by Redzed

Answered by Honest John
There should be a light, but because it reminds drivers of the inconvenience of not being able to stop until active regeneration has completed, no diesel car actually has this. There are two ways to tell. One is that the 'instant fuel economy' on the meter suddenly halves because diesel is being used to actively regenerate the DPF. The other is heat. If you stop and open the door without switching off the engine and sense considerable heat under the car, that is the DPF regenerating and it needs to continue for another 5 to 10 minutes.
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