Autozone ran diag and I have the PO 147 fault ( heated oxygen sensor bank 1 sensor 3). They didnt exactly know (to my comfort) which sensor this fault was for but suggested replacing the sensor thats under the rear passenger side located after the catalytic converter.

I would just like some confirmation that that is the correct one to replace.

Also will I need to clear the fault to remove the service engine light or is that automatic after its repaired.

Thanks a million.

 

Bank 1 is always on the side with your #1 spark plug and you count the sensors front to back of your exhaust.