please help reset evap and o2 sensor

[scot moore]

So trying to get my 2012 yukon denali ready for inspection. When I took it in it says my o2 sensor and evap sensor are not ready. they told me to drive the car 60 miles and bring it back. I did, but that didn't get either ready. I have since read about the evap sensor. I had less then 1/4 tank of gas so that might have been the issue. I have read about drive cycles and such. is there anything else I need to do, or check in order to get the o2 sensor ready? thanks

 

[Doubeleive]

So trying to get my 2012 yukon denali ready for inspection. When I took it in it says my o2 sensor and evap sensor are not ready. they told me to drive the car 60 miles and bring it back. I did, but that didn't get either ready. I have since read about the evap sensor. I had less then 1/4 tank of gas so that might have been the issue. I have read about drive cycles and such. is there anything else I need to do, or check in order to get the o2 sensor ready? thanks

put more gas in it and drive it, the evap can take a few drive cycles which means it has to be fully cooled down and then driven until fully warmed up and then repeat. you can't force it to happen. so drive it in the morning, park it, let it sit all day and then drive it in the evening again, let it sit overnight, then repeat until it sets. normally in most places you are allowed 1 sensor to be not set, so once the 02 set's you may be able to get it done inquire with the technician to confirm if you are allowed 1 not set or not.

 

[scot moore]

put more gas in it and drive it, the evap can take a few drive cycles which means it has to be fully cooled down and then driven until fully warmed up and then repeat. you can't force it to happen. so drive it in the morning, park it, let it sit all day and then drive it in the evening again, let it sit overnight, then repeat until it sets. normally in most places you are allowed 1 sensor to be not set, so once the 02 set's you may be able to get it done inquire with the technician to confirm if you are allowed 1 not set or not.

thanks, yes I can have 1 sensor that is not ready so I need the o2 sensor to get ready. I found the guide again how to monitor the readiness with torque. so at least I will know when it is ready. I also found a great guide for the evap readiness. it requires a cold start, and the vehicle to set for 17 hours. right now the cold start can not happen and the temps are not dropping enough overnight to ready the temps they need to be at.

 

[Doubeleive]

thanks, yes I can have 1 sensor that is not ready so I need the o2 sensor to get ready. I found the guide again how to monitor the readiness with torque. so at least I will know when it is ready. I also found a great guide for the evap readiness. it requires a cold start, and the vehicle to set for 17 hours. right now the cold start can not happen and the temps are not dropping enough overnight to ready the temps they need to be at.

Ya the evap can be hard to do, the 02 though should set easily

 

[scot moore]

I was surprised that driving highway and in town for 60 miles over the weekend did not reset the o2 sensor. I will try it some more. thanks again. I just wanted to check I wasn't missing something simple.

 

[j91z28d1]

my o2 passes really quickly. the evap is a mess, takes months for mine to test, probably like you say it can't cool down enough over night. it's 90s at night during the summer. this state is mostly miserable hahw

 

[Doubeleive]

I was surprised that driving highway and in town for 60 miles over the weekend did not reset the o2 sensor. I will try it some more. thanks again. I just wanted to check I wasn't missing something simple.

try driving it at 55 for a while, shut it off let it sit a minute then start it back up and drive some more at 55

 

[scot moore]

I was successful at getting the o2 sensor ready. I drove at 55mph for 6 miles then coasted down to 30mph. The status changed to ready. Thx again for the help

 

[Doubeleive]

I was successful at getting the o2 sensor ready. I drove at 55mph for 6 miles then coasted down to 30mph. The status changed to ready. Thx again for the help

I was told that once by a smog guy years ago, works most of the time, now get it inspected before something else happens lol

 

[89Suburban]

Good job guys.