Key will not work on 2002 Cadillac Eldorado

Everything was fine the last time it was driven. Went to leave in the car today and it will not start. Display reads
Starting Disabled Remove Key

Asked by for the 2002 Cadillac Eldorado
2 answers
Try another key if you have a spare as sometimes the chip on the key itself will fail and the ignition system won't work because the theft deterrent thinks someone is trying to steal it and if that doesn't work you will need to go to Cadillac parts dept and have another made
Try cleaning the key with alcohol,& if that doesn't work use a fine file & run it over the key 2-3 times. If that doesn't work you will need a new key.