I had this issue last year. It was even compounded by the fact that some keys would start the car... and some wouldn't! I replaced the EFI... and that worked for a few weeks. Then, the same thing again. Jackson sent one of these over. I waited until the issue resurfaced before I installed it...
I bought several replacement keys when I cracked the housing on one and had to use a pair of pliers to start it... :-)
Normally, all keys work when everything is working. Never any security light blinking...
It seems like there may be a fuse box issue as mentioned in the reply below.... sounds...
My beloved 2001 LC has a gremlin. She has 190k miles and still runs and rides like new. But, three long dealership visits and $$$$ later, the gremlin still remains. No one seems to be able to figure out this one. I'm hoping someone here has experienced a similar issue....
1) First issue; Car...