Trac control, vsc, engine light comes on!

To all, I purchased a new gas cap, put it on, the code lights went on one more time. I disconnected the battery for about 30 seconds then reconnected, and the lights have not come on since. So I figured it out.

After my 2013 Highlander V6 was jump started the engine check + trac off lights were on. Same solution - disconnect neg bat cable for a minute and checked gas cap. Magic! The warning light gremlins disappeared.

I had same issue, Check Engine + TRAC OFF came and no control over gass, it's not giving enough power to the wheels, so as per internet search, checked the gas cap and did the VSC ON / OFF, didn't fix the issue, so finally I checked all fuses in the fuse box, found one fuse 10A went bad for ETCS, after replacing the ETCS 10A fuse, everything came up normal .. :)

I have 2012 Highlander with 113,000 miles and Check Engine +TRAC OFF came on and dealer told me there is oil linking and I need to completely rebuild the Engine which will cost me over $10k. Any solutions?

I'm thinking altitude change is a trigger for the CEL and Trac Lock lights to come on. I was driving my 2013 Highlander 4WD from Vancouver to Pemberton yesterday and the highway starts to go up fairly significantly once you leave Whistler North and that's when the warning lights came on but there was no noticeable difference in the engine performance. When I dropped down to sea level again on my return to Vancouver later that evening the lights went out. I remember having problems with vapour lock driving a Toyota Camry from Florida thru the Colorado Rockies into Utah and Nevada on my way to San Francisco during a very hot summer and the engine actually sputter and shut down. Had to wait about 30 minutes to get it going every few hundred miles, once back at sea level all was good again.