Rear Tailight Code After Replacing the Lights
 

Just replaced my rear tail light bulbs and now I'm throwing taillight out codes on the dash monitor. The taillights are working perfectly, not sure what to do.

Did it trigger another bulb to burn out? Say a blinker? Some times we change one and another goes at the same. Sounds dumb but it happens. Can u verify all working?

Check the rear 3157 reverse lights, the 3157 brake/turn lights, the side lights on the rear housings (either a 168/194), the front 3157 turn signals, and also the front 168 sidemarker lights.

Easiest way to do this is to turn the key into the "RUN" position, but not starting the vehicle - then put your headlights on, put the e-brake on and put the Jeep into reverse (engine should NOT be running), and hit the 4-way flashers.

You should be able to see ALL the lights flashing or on at some point.
Reverse - ON.
Marker lights on fenders - ON (if you didn't do marker light mod)
front and rear turn signals - ON with 1/2 power and flashing at 100% power
Rear side marker lights - ON