Hi I drive a 2003 Seat Arosa 1.0s and I am currently having a bit of a problem with the exhaust emmisions light. Recently the light has started coming on and staying on for extended periods of time before going off again. The car drives fine and there are no noticible effects on the car when the light comes on. I have however noted that the light tends to come on when the car is: 1. Idling or close to Idle (I can sit on the motorway or on an A road at 60mph and the light won't come on) 2. When the car is idling there is a gentle thump from the engine and the rev counter moves very slightly (Barely noticible) 3. When the light does come on i am normally sitting in traffic and once it comes on it stays on for maybe a week before going out I have changed the spark plugs, air filter and leads, but this has made very little difference. The car also drinks quite a lot of petrol and on normal driving both in and out of town struggles to get 36-38 miles per gallon. It is annoying because otherwise the car is going great. Any suggestions as to what mite be causing the problem or any suggestions on how to fix it? Many Thanks
