Do you have an sports exhaust system , and therefor removed the catalycators?
If thats the case, you just remove the plugg from the (brain)on each box were the sensors from your exaust pipe are connected. Because this warning light is for protecting your catalysators.
If you have catalysators, check your sensors and their connection. You can try to take them out of the exaust pipe and rubb them with a fine sandpaper and put them back.