The engine warning light on my sons' 2002 Ford Focus 1.6 LX Estate illuminated about four months ago. He had it checked by a main dealer and was told the code indicated the Catalytic Convertor was defective. The engine warning light recently illuminated again and he had it checked at a local garage. This time, seven codes were reported including the Catalytic Convertor and the ABS. The only problem is, this model doesn't have ABS, so I'm starting to smell a rat! The car continues to run perfectly in all other respects. Both times the warning light has illuminated after a long run, and there have been no long runs in the intervening period. Has anybody any idea what's going on?