Try this to re-learn key and system--Turn ign to run position (don't start) wait till security light goes off--turn ign off and back on again (security light should be flashing) wait till light goes off again--turn off and back on (light will be flashing) when light goes off this time start the car (don't turn off before starting) This should take care of light-each procedure will take 15-30 minutes-be patient