o2 sensor not ready

Hello, it sounds like you are trying to get the diagnostic monitors of the engine processor to set. This is something that can be challenging to accomplish. My best advice would be to drive the vehicle for 10 or 15 minutes between 56 and 60 mph, sustained and unwavering. Usually if that's the case, any monitors that are not set will set. There's no guarantee here, and requires trial and error.