Evap system & oxygen sensor showing incomplete

Hey Tacoma World,
Just took my 2007 Toyota Tacoma for my SmogCheck and it did NOT pass because the evaporative system and oxygen sensor was not complete/NOT Ready! Is that running cycle issue or what other problems/solutions can that be? There are no OBDII codes showing currently...but, the SmogCheck place shows otherwise! Any ideas/solutions? Thanks...

 

Any recent repairs? Battery disconnect?

Usually it shows this after blasting codes out and it needs numerous drive cycles to recomplete.

 

Not recently, but I did changed the oil, air filter, and spark plugs a few months ago! I think what happened...this AM, I tried turning on my truck and the battery was dead. I had to jumped-start it with my other car. Do you think that’s the main issue/problem? And, what do you suggest me doing to resolve it? The SmotCheck tech told me to turn on the truck (let it sit there while ON), then drive the truck on a consistent speed; +55MPH for about 15-20 minutes. Then, let it sit for another 5-10 mins. Is that about right?

 

100% the battery dying reset the trip.

It's usually a few days of regular driving that will set the trips to complete.

So at the very least, make sure the battery is ok a few days before emissions test.

Handheld scanners can show if monitors are complete as well, they can be as cheap as 40$

 

I see! Bummer, that’s what I thought...I guess I will have to drive it around the next couple of days as I normally do; maybe, a few long trips will do! Thanks for the advise, much appreciated!

And yes, I saw that! I do have one...but, I don’t think mine has those capabilities to transcribe the full monitors of the emissions. I will look into that! Thanks again!

 

https://axleaddict.com/auto-repair/Toyota-Drive-Cycle-Readiness-Monitors-for-Emissions

It's not the official method but it's worked for me in the past.

-J

 

What should you do? If the battery was dead replace it, provided the alternator is good.

 

@JustAddMud Thanks! I’ll give that link/drive cycle sample a try! Still gotta drive my truck for a few days...still shows the Evap system and Oxygen sensor monitors as INCOMPLETE.

 

Don't ignore the battery problem. 3ish times of running it dead will kill the battery. A bad battery can also overwork the alternator, killing it. Get your charging system tested, and check your parasitic draw.