I bought a 2006 Hyundai Tucson in October 2017. The engine warning light was flashing when I test drove it and I was told that this was the DPF. I was aassured it would be fixed and it was okay when I collected it, but has been back twice for the same problem and the last time (30 November) a full regeneration was done by a specialist. The light has now come on again (150 miles later) and the garage are saying I am not driving it far enough, which seems ridiculous. I have read up about DPFs, but can't believe that it would need cleaning out again after only 150 miles, which included several half hour trips at 40 - 60mph and a blast down the motorway at 70mph for about 20 - 30 minutes. I would be grateful for your comments.