I have a 2002 S2000. I'm intermittently have issues with the Green Key flashing that won't allow the car to start - it turns over fine. I've changed the fuse, cleaned the fuse holder and even changed the battery. It has never left me stranded yet, but probably will sometime. Sometimes it starts on the first try, others it might be the 10th. Could it be the key chip? If not, any suggestions of what to do?

 

It may be the key sense on the ignition switch going out