hello, i recently purchased an OBD 2 scan tool for my car and one of its features is "i/m monitors". from what ive read that feature is supposed to tell you when your car is completely "ready" to go take an emissions test. the obd 2 code reader has a list of items that either come up READY, NOT READY, or NOT APPLICALBE. on to my question......

there are 8 different monitors that are "applicable" to my vehicle.

the first 3 are the MISFIRE MONITOR, FUEL SYSTEM MONITOR, AND COMPREHENSIVE COMPONENTS MONITOR. no matter what, those 3 ALWAYS say ready.

the last 3 monitors, which are the OXYGEN SENSOR MONITOR, OXYGEN HEATER SENSOR MONITOR, and EGR SYSTEM MONITOR, come on and off at different times, sometimes none of them are ready, sometimes they're all ready, sometimes 1 is ready while the other 2 are not.

now on to the middle 2 monitors, which brings me to my question. they are the CATALYST MONITOR, and the EVAP SYSTEM MONITOR.
those 2 never say they are ready. they never have. im just wondering basically what that means, and what i'd need to do to fix that, to make them show up as "ready"

the car runs perfect and my state does not do emissions testing, so im not worried about it, im just really curious....