Yukon Denali 02's

[Dan2002]

Hi. I had check engine for a while. It is now to get the O2 sensors fixed.

I have the codes P0141 and P0157 sometimes one comes before the other one.

Anything I should check before replacing them ?

 

[Scottydoggs]

those codes are for both bank one sensors. id change all 4 of em. once they pass 80,000 miles their life span is about over.

id also stick with delco sensors.

 

[Dan2002]

those codes are for both bank one sensors. id change all 4 of em. once they pass 80,000 miles their life span is about over.

id also stick with delco sensors.

According to my scanner one is "bank 1 sensor 2" and the other one is "bank 2 sensor 2". So it's the sensor 2 on both banks

 

[Scottydoggs]

my bad. its both your post cat o2's are bad.

chances are you got well over 100,000 miles on the truck, be best to change all of em. mpg can pick up some and run much smoother over all. they do have a life span. and get lazy after 80,000 miles.

 

[Dan2002]

my bad. its both your post cat o2's are bad.

chances are you got well over 100,000 miles on the truck, be best to change all of em. mpg can pick up some and run much smoother over all. they do have a life span. and get lazy after 80,000 miles.

I will replace all 4 just to make sure.