Probably need the code numbers.... Try turning on/off the ignition switch 2 time and the leave it on third time, and get the codes in the mileage/odometer window, or borrow OBD II code reader, with the codes you can find the description of what computer code are defining and may give clues what to do to fix them...

One of many how to read codes for Jeep on Youtube...

OBD II code "general" listing for most vehicles...

https://obdii.pro/en/model/chrysler

Jeep Specific Codes..

https://www.engine-light-help.com/jeep-check-engine-light.html

Dale

 

GarretYoung what year and engine is the jeep.

Have you disconnected the battery?
The jeep powertrain s STOCK?

 

The evap errors can often be a bad purge solenoid or valve or simply just a bad gas cap.
O2 sensor errors are usually just that. O2 sensors. They are common wear parts.
The catalyst error could be tied to the O2 sensor errors.

As mentioned, exact codes will help greatly. And the info jtec asked for.

 

It sounds as though your codes and data were very recently cleared and not all readiness monitors had run again. It takes some specific drive cycles for all readiness monitors to clear. It prevents people from disconnecting the cable and going for the "test".