How do you solve this problem on Honda crv 2007 model the key sign on instrument cluster is flashiing and car not start?

the most likey cause of your problem is that the key is not programed in the immobolizer system use a different key that you have if all the key do not work you will need to have the car towed to your Honda dealer so that they can reprogam the keys you must bring all of the keys with you help this help