Need help with 1998 Chevy Cavalier?

chapisag7

New Member
What does it mean when the machine says

Bank1 Sensor1

The car turns on for like 2 sec. and then it turns of checked the gas, spark plugs, and everything I can think of. When I put the machine everything is fine exept it says that. Also when I try to turn it on a light blinks saying theft something I cant remember the other word. But why does it say Bank1 Sensor1? Please help.
 
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