One problem related to o2 sensor has been reported for the 2005 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Jeep Grand Cherokee based on all problems reported for the 2005 Grand Cherokee.
I purchased my 05 Jeep Grand Cherokee 3. 7l v6 with 79k miles on it June 21, 2016. In July of 2017, it started to bog down with a constant shutter when starting up and accelerating, the cel was also on. I took it in to have the cel checked out and it was showing 22 codes saying that the O2 sensor had a high voltage circuit. Upon examinng and testing the O2 sensor there was nothing found to be wrong. A couple weeks later the cel came on again, but this time it showed the same O2 sensor was running lean and rich at the same time. I replaced the sensor at that time. Now it is showing another code p0430 and the timing chain for the electronic shift transmission is jumping. I was informed this happens to these transmissions all the time and there is no repair for it. All I can do is drive it until it goes and buy a new transmission. This is not fair.