One problem related to o2 sensor has been reported for the 2002 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Jeep Grand Cherokee based on all problems reported for the 2002 Grand Cherokee.
Just had the eniter exaust system replaced due to the cats were plugged . Replaced cats and all O2 sensors with factory oem's and now the car give 3 different codes , p0141, p0138, p1499 . After the codes showed up took back to shop and had to replace all the O2 senors again to the tune of $500. 00 plus labor. And went to drive and get tested only to fail again, for bank 1 sensor 2 high voltage detected. Now shop is telling me there was a problem with the pmc and it needs to be replaced to the tune of another $450. 00 plus labor.