Why is the fan in my Volkswagen Passat running after I've turned the engine off?

Since having the emissions fix on my Volkswagen Passat, I noticed the fan running for twenty or so seconds after I had switched off and locked the car. It sounded so loud and I've never noticed it before.
That's because the DPF has been actively regenerating and gets very hot. But I'd still get it checked by the dealer.
Answered by Honest John on

Ask Honest John