John Tubbs

We have had an S type 2.7 d 2005 for ten years. We have never had the orange warning light come on on its own. The orange and red light come on together. We have never been able to clear the lights by driving the car.The problem is invariably egr valve, dpf or both. It has been to various Jag dealers an auto electriciaen but the problem has never been resolved.if anyone could help it would be much appreciated