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 idle (to about 850rpm) it cuts out. this happens around 5 times out of 10. also there is a smell of unburnt petrol in the air when it finally starts up. its very sluggish, looses power occasionally, and hesitant to pull off at lights. spoken to a few people they think it could be either egr valve or llamda sensor but its difficult to say. really hope anyone can help me! thanks for readin'