1040658
Did this problem ever get resolved. I'm currently having the same problem on a 97 Cherokee. The light comes on (with a code 21) and when my mechanic resets the code and checks the sensors they both are operating normally. How did you solve your problem?
Thanks[addsig]
1040659
I've got an "interesting" problem with my 97 Jeep cherokee - 4.oL engine. The infamous check engine light came on - with codes indicating a problem in the oxygen sensor circuit. My mechanic replaced the rear sensor (twice - but that's a long story) but the Check Engine Light is still...