If the C/E light came on, check that fuse again. Also take your jeep to a big box store like Advance auto & have them check the codes.

Mine read pre-cat O2 circuit fault.

After replacing the fuse, did you disconnect one battery terminal?

If the fuse is blown again, there may be a short somewhere in the circuit.

Keep after it, you will get it straight soon!

 

It is likely that you smoked the sensor. The signal that the sensor puts out is 0-1 volts. The heater in the sensor (4 wire sensors are heated) runs off of 12 volts. Depending on how you wired it, you could have put 12 v on the sense output terminals (50% chance). Get another O2 sensor (you will need one evetually since Jeeps need new ones ~60k miles and they last for 300k+) and see if it solves the problem.