: O-2 Trouble codes



bravo366
09-07-04, 09:26 PM
Ok, I'm getting codes P0137(Bank 1 sensor 2) , P0154 (Bank 2 sensor 1) and P1153 which also says Bank 2 sensor 1, insufficient switching? It says these are O2 sensors but how do you tell which ones?

JimD
09-07-04, 09:59 PM
Hard to answer for sure without knowing your year / model. Generally, you can expect the following:

Bank 1, sensor 1 is the O2 sensor very close to the head on the bank that includes cylinder #1.

Bank 2, sensor 1 is the O2 sensor very close to the head on the bank that includes cylinder #2.

Bank 1, sensor 2 is directly in front of the catalytic converter. Be aware: this sensor was eliminated (at least on Sevilles per the Service Manual) during the 1998 production year.

Bank 1, sensor 3 is directly behind the catalytic converter.

Hope this helps more than it confuses.