buy a socket for oxygent snesor, check the number, then buy one

if go to dealer, cost>$300. I just replaced one.

Buy a auto-scanner (<$50 in Amazon), you will find the code, indicating which part is broken. >99% is the oxygen sensor is bad, if driving >60K miles.

type: replace oxygen sensor in Google, you will see the Youtube, show you how to replace it. It is simple.