Question about 1998 Jeep Cherokee
Thanks for using FixYa. The check engine light is on because ECM (Control Module) detected a fault with your car's system. ECM has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" light to tell you that there is a problem and your car needs to be looked at. The fault code is known as an "OBD2" fault, it seems that you are right that the oxygen sensor needs to be replaced. Please do accept the solution if the issue is resolved or post a comment for further assistance.
Posted on Jul 29, 2010
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Posted on Jan 02, 2017
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