O2 Sensors (1 Viewer)

[Sky Soldier]

Okay, check engine light and two codes came up - P0037, Bank 1 Sensor 1 and P0057 Bank 2 Sensor 2. Kinda odd wouldn't you think? Upsteam on one side and downstream on the other side? What do you think - replace both sensors on each side or just the bad sensors on their respective side?

 

[andymmiami]

If I am not mistaken, the downstream o2 sensor that is post cat won't trigger the CEL only the up stream one that is after the first cat will trigger the CEL. It s possible the downstream one failed a while ago but you didn't know and the new one that died just failed.

 

[AVLTOYOTECH]

Okay, check engine light and two codes came up - P0037, Bank 1 Sensor 1 and P0057 Bank 2 Sensor 2. Kinda odd wouldn't you think? Upsteam on one side and downstream on the other side? What do you think - replace both sensors on each side or just the bad sensors on their respective side?

I did some research on the codes. P0037 and P0057 are for bank 1 sensor 2 and bank 2 sensor 2 respectively ( downstream from the catalyst) These both get power for the heater circuit from the same source (EFI FUSE No. 2 and the EFI relay). While it’s completely possible both sensors have failed, I would check the fuse, relay, and wiring first since they share the same power source.

 

[Sky Soldier]

I did some research on the codes. P0037 and P0057 are for bank 1 sensor 2 and bank 2 sensor 2 respectively ( downstream from the catalyst) These both get power for the heater circuit from the same source (EFI FUSE No. 2 and the EFI relay). While it’s completely possible both sensors have failed, I would check the fuse, relay, and wiring first since they share the same power source.

Thanks, I will. I have purchased 4 new O2 sensors since previous owners were somewhat negligent in maintenance.