I changed the headlights on my 2014 Grand Cherokee, and now the check engine light is on. I had to unhook the computer to get to the headline, but what do these codes mean? Do I need to something since I unhooked the computer?
Cool, thanks Phil. I didn't realize there was a standard for them, but in retrospect it makes perfect sense. Now I know that the code I kept getting with my '14 meant P20EE SCR NOx Catalyst Efficiency Below Threshold Bank 1