My 2000 Toyota Avalon's check engine light won't go away..?

Recently the check engine light came on in my 2000 Toyota Avalon XLS.. So I took it down to an autozone and they said that it was the oxygen sensors. So I had all the sensors replaced. the bank 1 sensor 1 and bank 2 sensor 2. But the light is still on. and when you try to pull up the code.. it puts a ? on the sensor 1. I ignored it for a while and had a checked again.. hopefully this time the mechanic could erase the code. now it says something like Manufacture __..? What does this mean and how/what can i do to get rid of the check engine light? Thanks
 
GO TO AUTOZONE AND TELL THEM YOUR CHECK ENGINE LIGHT IS ON AND THAT YOU NEED TO FIND OUT WHY. IT IS FREE FOR THEY TO HOOK UP THE COMPUTER. I WAS A MANAGER THERE A COUPLE OF YEARS AGO
 
GO TO AUTOZONE AND TELL THEM YOUR CHECK ENGINE LIGHT IS ON AND THAT YOU NEED TO FIND OUT WHY. IT IS FREE FOR THEY TO HOOK UP THE COMPUTER. I WAS A MANAGER THERE A COUPLE OF YEARS AGO
 
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