02 sensor 1999 tahoe PROBLEM

[chad67chev]

i have a code P0154 O2 sensor CKT inactive (bank 2 sensor 1)
What does that mean? Where is it located? thank you

 

[Immortalmort]

You may have a bad oxygen sensor on your truck, what's the year of it? Oxygen sensors are located on your exhaust pipes, on both left and right exhaust manifolds and behind the catalytic converter(s) of both pipes.

 

[strad]

I can't tell you which bank is which, but sensor 1 will be the forward one and sensor 2 will be the one aft of the cat. There are four total, 2 for each bank.

 

[992door]

I believe passenger side before the cat is that one. (someone correct me if i am wrong)

 

[SunlitComet]

same regard as your other post on that same sensor. verify wiring path integrity and if no issues replace the sensor. right cylhead mounted just behind the exhaust manifold.