DPFs get blocked with soot, and the warning light is your first indication that this has happened.
There are different stages of DPF blockages, and they can be treated differently.
Your DPF will become blocked when soot builds up in it. To clear it, the soot needs to burn away.
No. If your car has a DPF, you are not allowed to remove it.
Yes, you can use Redex DPF Cleaner to prevent problems as well as cure them.
We recommend that you use Redex DPF Cleaner in every second or third tank of fuel, particularly if you drive short journeys or do a lot of stop/start driving in a city.