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1994 cherokee

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Old 10-06-2011, 12:17 PM
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I have a 1994 cherokee and the check engine light came on mow it wants to bog sow when it first starts what would cause this
Thanks
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Old 10-06-2011, 12:55 PM
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Check the codes by doing the key-on key-off trick. Google search "Jeep Cherokee code xxxxx" and go from there.
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Old 10-06-2011, 02:55 PM
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Would an bad o2 sensor make it bog down at idle
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Old 10-06-2011, 04:58 PM
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key on key off method see what come uphttp://jeep-xj.info/HowtoECUcodes.htm
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Old 10-06-2011, 05:07 PM
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I have code 12 21 55 how do I fix and reset
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Old 10-06-2011, 05:19 PM
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12 and 55 disregard 21 it o2 sensor start there
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Old 10-06-2011, 05:43 PM
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Is it just a connection or the sensor and how do I reset the light
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Old 10-06-2011, 05:48 PM
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Originally Posted by 94cherokeeman
Is it just a connection or the sensor and how do I reset the light
only testing or replacing will tell which it is ,taking the negative battery post of for about 15 minutes should cure the light
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Old 10-06-2011, 05:50 PM
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the light is there to tell you there is a issue in that area ,most of the time replacing the part that the codes are for will correct it but its not a guarantee ever
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Old 10-06-2011, 06:08 PM
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Ok thanks
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Old 10-06-2011, 06:13 PM
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your welcome
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