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Which O2 sensor? P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

12K views 3 replies 1 participant last post by  ClkE 
#1 ·
My Engine light came on. My code was: P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

I need to know which sensor to change.

Thanks for any and all help
 
G
#3 ·
My Engine light came on. My code was: P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

I need to know which sensor to change.

Thanks for any and all help

I've changed one 02 sensor on my Clk 430 about 5 years ago so I don't remember clearly which side is bank 1 and 2. I'm gonna try to help you by using my common sense here. Here go............. I know for a fact that cylinder #1 is on the passenger side, which common sense telling me, that is BANK 1. As for sensor 1 and 2, sensor 1 is before the CAT and sensor 2 is after the CAT.
 
#4 · (Edited)
As always, Linh to the rescue! Thanks I just ordered it from Autopartsway for 101 bux. I figured that it was that one because it was cracked after changing the engine mounts. I just wanted to be sure because after I bent it back and reset the light didnt come back on for a while.
 
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