car wont start, Security gage flashing

i had just put in 02 senor turned on and ran. the next day didnt turn on.service light on, check gags on and security light flashing. Engine dosent make any noise not the battery.

sounds like your vats just went bye bye. click the key on and the car does nothing? to replace the cylanoid the vats reads when u turn your key costs about 100-120 bucks. or u can do like i did and take the damn thing off and run the chip in your key to the wire so u can be like to hell with it. down side is now your car can be hot wired and stolen but a good alarm can take care of that