I can see myself that the problem is not major cuz the car drives fine, the engine is working smoothly. The gearbox is switching alright. I was just wondering if the light can come on because of a spark plug. The car was £1000 and they drop down the price with £100 for me to fix the problem, when i saw that the car is running alright, i just bought it, didn't think too much. Btw i know the quick fix solution😀😀