Bank 1, Sensor 2 is..........

[Robb]

........driver's side passed the CAT right?

I have replaced that O2 sensor on two different trucks today (same P0141 code), and the CEL has come back on, on both of them now.

 

[Robb]

DOH!!! Nevermind.......................

 

[Runnin'OnEmpty]

I guess you found the correct one, right Robb?

Just to set the record straight: bank 1 is the passenger side, and the sensors are numbered with number 1 closest to the exhaust manifold.

 

[Robb]

You are correct. I was thinking that Bank1 meant driver's side, when Bank1 actually means the side with #1 cylinder.

I swapped both of the sensors this afternoon, and so far neither has thrown the CEL yet. :cross fingers: