warning lamp marked key.
 

To begin with sorry for my bad english but hopefully you can help me anyways.

Ive got a Grand cherokee -02 V8 and recently a lamp with a "key" thats has a "/"over it started to light from time to time in orange.
Its some sort of start blocker and when its not lit it starts and runs smooth.
I tried both the original key and the spare key but same problem.
Regards/Brutus