CEL always on
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Freshman User
Joined: Aug 2003
Posts: 28
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CEL always on
my CEL has been on for about half a year now. i bring it to get it checked out about 10 times already. first it says its CAT efficiency, then it says its the O2 sensor. so i changed the o2 sensor. but the light will go off for a day and come back on. then my car battery died, and someone told me that its definitely because of the battery. now i changed the battery, but the CEL is still on. Does anyone have any ideas? I can use any help
1997 explorer 4 door
V8
1997 explorer 4 door
V8
