warning lights flash quickly on then off while driving.

It's quite difficult to guess why this has happened, only checking for any present diagnostic trouble codes present in any of the vehicle control modules would be a good start - not only the engine's processor, but body control modules also, and chassis ones. This would require a diagnostic tool more elaborate than your typical generic "code reader". That said, no codes may be present, and you may need to have test equipment hooked up during the times the failure actually occurs..