02 sensors

[bdw78]

hello all, I am new here.. I am trying to find out if all 4 of my 02 sensors are the same part number on a 2004 Chevy Tahoe z71? I get mixed answers from people.. thank you

 

[wjburken]

hello all, I am new here.. I am trying to find out if all 4 of my 02 sensors are the same part number on a 2004 Chevy Tahoe z71? I get mixed answers from people.. thank you

According to Rock Auto, upstream and down stream are same number

 

[herbert77060]

To piggyback off this question...I had the Bank 1 Sensor 2 replaced on my 2013 Tahoe. My mechanic said the sensors should be replaced in pairs. The scan from a chain auto parts store and the mechanic's scanner said the Bank 1 Sensor 2 needed to be replaced. The vehicle runs and idles smooth again. What do you think?

 

[OR VietVet]

To piggyback off this question...I had the Bank 1 Sensor 2 replaced on my 2013 Tahoe. My mechanic said the sensors should be replaced in pairs. The scan from a chain auto parts store and the mechanic's scanner said the Bank 1 Sensor 2 needed to be replaced. The vehicle runs and idles smooth again. What do you think?

IMO, I would replace all 4 at the same time. Especially anytime after 150k miles.

 

[rockola1971]

Isnt bank 1&2 sensor 2 after the cats? If they are then they do NOTHING concerning your fuel to air mixture control. They serve no purpose other than to tell you that your cats are bad or are near bad. Its your pre cat sensors that control your fuel to air mixture by supplying your PCM with 02 readings.

 

[herbert77060]

IMO, I would replace all 4 at the same time. Especially anytime after 150k miles.

I am no where near 150K miles. It is just a little over 101K.