Check engine light with code P0442?

Yep, this means there is a leak in the system, I would raise the car up and use a flashlight to see if you can find any hoses that are off or have a split in them, the one in the image you have provided does not look like it is leaking.

The P0442 code indicates a small leak detected in the EVAP (Evaporative Emission Control System).

Here is an image of the system so you can see which hoses to check and how it works. If the hoses are okay, I have seen the charcoal canister cause this problem. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.

Yes I will get back you!
Thanks!

Thanks!

Sounds good, you can use a smoke machine to help look for the leak which is what most repair garages have.

Sorry about delay. I just moved to TX. I bought a cheap Manual smoke machine. Could this work in place of better smoke leak detection units? Where would I splice it into Evap system tubing with a tee. See image.

No worries, thanks for getting back to us, yes as long as you can pump smoke into the system, we are good to go, let me know what you find. My guess is it will be the canister itself. Check out the images (below). Please let us know what happens.

Will do!

I could not see any missing, loose or damaged hoses and did not see any smoke when I used the crappy manual smoke leak detector. If I get a quality smoke leak detector. Could I connect to 1 of the hoses that that runs to Purge Control Valve that is under hood. Behind Throttle Body? And do I have to close this valve first? Also, what are the chances that there is another cause for P0442? Like bad O2 sensor, or Cat, etc? And how does one test Charcoal Canister? Is there a small motor or solenoid on canister?

Thanks!

A bad cat or 02 will not cause this code, there is a control solenoid by the charcoal canister and there is a purge valve under the hood, if either of these leak it can cause the code. Please go overt his guide to help us fix it:

https://www.2carpros.com/articles/evap-system-code-repair

Let us know what you find.

Okay, sorry about the delay.
I moved to TX and took Rav4 to the dealer.
They put an OE gas cap on and cleared code. Did not check hoses or perform smoke leak check.
Light has not come back on after 2 weeks.
So, we will close this question/ticket.
Thank you for your help!

Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.

CEL on.
Also VSC Trac light on
Also Trac Off light on.
Replaced the Gas cap with multiple OEM caps. Cleared code. Lights keep returning.

Should I use Smoke tool to look for leaks in hoses?
Maybe replace charcoal canister and purge valve?
Any chance O2 sensor is involved?

Yes, please go over this video to help find the leak, plus start a new thread for the VSC Trac light on.

https://www.youtube.com/watch?v=aTNr3IEgVF0

Let us know what you find.

OK. I thought the Trac Light issue was part of P0442?

The code #p0442 is not a part of the trac light, sorry. Let me know after the leak test.