Hi guys..I had to stop a bit sharp in a supermarket carpark today when someone backed out of a parking space..it was a near miss....(Phew) but after that my engine warning light came on, the car still does all the things it's supposed to starts and runs fine, but the light stays on now..

it's not the petrol cap....I just done a 70 mile round trip in it no problem mine is an Auto by the way....

any help guys