why would a 2001 ford mustang have its check engine light on?

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xoxo

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it has 104,000 miles.
it had never had any problems.
last time i saw the engine light on was at 94000 miles
and it turned off on its own in about 24 hours...

what do u think the chances are of it turning off on its own?
what could b the probb?
 
Your car has an OBD or On Board Diagnositic systems computer.The "Check Eng" light coming on is an indicator that the OBD system has or has seen a problema problem. Most of the time when the car is restarted if the problem is not pressent no light, then light on all of the time is usually and hard fault in need of repairs.Most reliable repair shop have equipment to retrive the trouble code in the OBD system then check what is causing your ck. eng. light to come on.
 
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