O2 sensore

[Maw7989]

Thinking about replacing the o2 sensors on my 2009 yukon 5.3. It just turned over 130k and figured it probably wouldn't be a bad time to change them. What brand do you guys recommend?

 

[kbuskill]

Thinking about replacing the o2 sensors on my 2009 yukon 5.3. It just turned over 130k and figured it probably wouldn't be a bad time to change them. What brand do you guys recommend?

Denso/AC Delco

 

[915_Tahoe]

gm#12609457 takes 2 $90 ech.
gm#12583804 takes 2 $86.05 ech.

 

[Danny3737]

I’d leave them alone unless you are having issues. I’ve seen them work well over $230K miles.

 

[Maw7989]

Thank you. Amazon has the denso onse for a good price

 

[swathdiver]

This is what I'm replacing mine with next week:

https://www.amazon.com/dp/B0010GHAI...olid=3MYY1OQK1UL4M&psc=0&ref_=lv_ov_lig_dp_it

Just doing the upstream sensors. One has gone lazy at 135K.

These are the downstream sensors that measure the health of the cats:

https://www.amazon.com/dp/B0016IGZ1...olid=3MYY1OQK1UL4M&psc=0&ref_=lv_ov_lig_dp_it

 

[gooffeyguy]

This is what I'm replacing mine with next week:

https://www.amazon.com/dp/B0010GHAI...olid=3MYY1OQK1UL4M&psc=0&ref_=lv_ov_lig_dp_it

Just doing the upstream sensors. One has gone lazy at 135K.

These are the downstream sensors that measure the health of the cats:

https://www.amazon.com/dp/B0016IGZ1...olid=3MYY1OQK1UL4M&psc=0&ref_=lv_ov_lig_dp_it

How do you tell if they're getting lazy?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[swathdiver]

How do you tell if they're getting lazy?

I watch it with the scan tool. The upstream sensors are supposed to cycle between 50-900 mv and as of late are rarely passing the 700s and instead of going all the way down, sometimes hang in the 300s for a moment before cycling properly again. One is worse then the other. They were just fine 3 months ago. Still not bad enough to throw a code and mileage does not appear to be suffering though I've switched fuels again trying out this E30.

The Tech-2 also allows you to run a graph but the problem with these is easy enough to see by the numbers.

 

[gooffeyguy]

I watch it with the scan tool. The upstream sensors are supposed to cycle between 50-900 mv and as of late are rarely passing the 700s and instead of going all the way down, sometimes hang in the 300s for a moment before cycling properly again. One is worse then the other. They were just fine 3 months ago. Still not bad enough to throw a code and mileage does not appear to be suffering though I've switched fuels again trying out this E30.

The Tech-2 also allows you to run a graph but the problem with these is easy enough to see by the numbers.

Thanks, I may try to watch the upstream sensor voltages on my Torque Pro app to see how my sensors ars doing.

My 2012 runs fine, but since it's new to me and I got it with 100k miles on it (currently has 105600) I don't know if they've been replaced.

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[swathdiver]

Thanks, I may try to watch the upstream sensor voltages on my Torque Pro app to see how my sensors ars doing.

My 2012 runs fine, but since it's new to me and I got it with 100k miles on it (currently has 105600) I don't know if they've been replaced.

You should have no problem watching them with that app. I know Ken does. @kbuskill