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1997 Jeep XJ Check Engine Light On! Please Help

Old 01-06-2015, 07:05 AM
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Default 1997 Jeep XJ Check Engine Light On! Please Help

Hi,
So this morning on my way to school, which is about a 25 mile trip, my check engine light came on. Jeep was running fine no issues, at least that I could tell. Once I got to school I checked the computer codes and I got codes 12,31,55.
So this is where I am now, any help would be greatly appreciated.
Thanks in advanced.
Old 01-06-2015, 07:17 AM
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Look them up here on the forum they are all listed.
Old 01-06-2015, 11:50 PM
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Ignore the 12 and 55, they are normal. 31 is an evap system leak.
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