hi guys, i have a 1.0 2001 arosa s with the exhaust emissions warning light on. it has come on a few times, flashed a few times then gone solid. every time this happens i pull over, switch off the engine, wait for about 10 mins then start it up again and the light goes off. the day before last i was driving back from bristol to cardiff (not far) when the same thing happened. i pulled over and did the same as always but this time the light stayed on, and is still on. Recently when ive been starting the car, the revs rise to around 1400 as usual, then as the revs drop with the engine going into