ShannonD

I have a 2012 sport unlimited 4 dr right hand drive that I use everyday as a rural carrier. Last cpl weeks jeep has sporadically started running rough. Acts like is wants to stall but doesnt. Chugs sometimes. Well this am, omw to work, engine light came on and flashed throughout my 20 min drive. Checked codes and got p0420, p0456, p0305, p0430 and p0205. Dont know where to start with this. Please any advice would be great. Thank you.

AZJKU2017

Start with the p0305 #5 misfire probably caused by p0205 #5 injector circuit, check #5 injector wiring (do you have a rodent problem eating wiring?), check wiring, then replace injector and see what happens. . P0456 is evap emission leak, 0420 and 0430 are cat efficiency (fix misfire first)

jedg

AZJKU2017 is correct. You need to address P0205 first. This is likely causing P0305. As for P0420 and P0430... if you've been driving it and it was running rich, you may have ruined the catalytic converters... depending on how long you ran the vehicle with it running rich.

First things first though. Look for wiring issues related to the #5 injector circuit. Then look for wiring issues for the rest.