Spanner light

[aaron_one]

Right, i left the house the other morning on the way to manchester and the car jolted and all the lights inc service light came on and didn't start for a few minutes.
The engine management light then stayed on for a while and then went off when i got to manchester, however on start up there is a spanner which comes on and '-350' flashes before disappearing, every so often this number rises, anyone have any idea what it could be?

Thanks