Check Engine: VSC lights on

Update:

Had engine codes read:

P0441 Evap Emission Control System Purge Flow Fault

P0446 Evap Emission Control System Vent Circuit Malfunction

P0441 as above

P0442 Evap Emission Control System ... leak (small)

P0446 as above

After finding out the codes, we reset the codes via an option on the reader. Both check engine and VSC lights are out for the moment.

I checked to make sure the gas cap is on tight. Have also checked the hoses coming from the air cleaner housing.

Any other suggestions?

Thanks. I've only had the vehicle a week now and have put gas 2x into tank. I will be more attentive to tightening the gas cap. Will report back if lights go on again.

I have read that sometimes the lights could indicate either a charcoal canister or its associated sensor. let's hope it's no more than a loose gas cap.

Thanks again. Will check the cap and make sure gasket and where it seats are both clean and smooth. May even put o-ring lubricant just to be sure.

Take the car to a Toyota dealer. The repairs may be covered by the emissions warranty. I doubt if a loose gas cap caused all those trouble codes, there is probably a problem with one of the evaporative emissions valve.

I've got to agree with Jeff. S. My one hour at the Toy dealer to find out that my multiple error codes were based on a loose gas cap cost me $88 labor, and the problem never returned....believe me, I give the gas cap another couple of twirls now!

Thanks for the help AND reassurance. I am still in GMC pickup mode, the vehicle I had before the Highlander. Will be more careful and definitely will listen for the clicks.

For the record, problem was not the gas cap. It was a disconnected/loose vacuum hose to the filter box.