Now that I'm in the 'correct' WJ forum... Did you know there's more than 1? This new AI crap ain't making it for me. Anyway, ran into something yesterday that has me scratchin' the noggin... I recently did some work on my WJ 4.0 & swapped the fan relay, lower rad hose & did a flush & fill, in response to an overheat & a couple DTCs. I thought I cleared the DTCs (maybe I didn't), but afterward, it drove fine, but more like a truck than a soccer-mom SUV. I kept my eye on it, but really... O2 weird reading