Hi Guys Need some help my B6 A4 1.9 TDI 130. It starts up fine but once my coolant temp reaches 90 it starts to judder when accelerating between 2k - 3k revs and the orange triangle light comes on and when I'm stationary the car shakes. Now after around 3-5 mins of it doing this, if i turn the engine off and back on it clears the warning light and works fine for the rest of the journey. Car has been serviced just over a week ago and this started happening before the service. Any ideas?