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1997 Jeep XJ Check Engine Light On! Please Help

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Old Jan 6, 2015 | 07:05 AM
  #1  
Gtrsrlly's Avatar
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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.
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Old Jan 6, 2015 | 07:17 AM
  #2  
Fred/N0AZZ's Avatar
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From: Monett, MO.
Year: 1999
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Engine: 4.0
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Look them up here on the forum they are all listed.
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Old Jan 6, 2015 | 11:50 PM
  #3  
Radi's Avatar
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From: Wisconsin
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Ignore the 12 and 55, they are normal. 31 is an evap system leak.
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