Question about 2004 Jeep Grand Cherokee

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OBD indicator light is on - 2004 Jeep Grand Cherokee

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The first thing is to have the computer scanned for the stored codes, the codes will tell you what is failing, for exaple there could be a code like po 173 saying o2 sensor heater curcuit high voltage, which nwould tell you that the o2 sensor is bad. so start with the scan, autozone and some other autopart stores will scan it for no charge. hope this helps.

Posted on Sep 16, 2010

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Posted on Jan 02, 2017

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Why do the check engine light keep coming on after the 02 sensor have been changed


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