Okay, I had the code P1273 come up on my Maxima and I need to fix. Most common answers I have found on websites and this forum is O2 sensors. Where can I get these sensors for a good price? Not much else is known on my part. I took the car to AutoZone and he put a cheap OBDII scanner and found this code. This is about the extent of what I know.

 

P1273 is the bank 1 A/F sensor. Bank 1 is the side of the engine towards the firewall. A/F sensor (air/fuel ratio sensor) is Nissan's fancy name for oxygen sensor. Parts stores will call it the rear upstream sensor.

If you order on-line, Rock Auto Parts (rockauto.com) usually has the best prices.

At the dealer, it is part # 22693-7Y020, msrp $211.