Make use of your warranty and go back.

 

I intend to, I just don't like going in blind and like to have an idea of what might be happening. The first occurrence was yesterday and the second occurrence was this morning so I'll be calling first thing tomorrow.

 

^ This. It immediately reminds me of another post on this subject. To do the computer update for the recall, the instructions advise to unplug the radiator fan so that it's not running the whole time the update is happening because it could cause fluctuations in battery voltage. But then the tech has to plug the fan back in when they're done. Already another member here found out the hard way that they forgot to plug the fan back in.

Here's the diagram for the fan plug from the instructions for the recall. You may be able to check your car yourself and save another trip to the dealer.

 

Exactly.

This should now require the shop foreskin to check every HL before it leaves. That ought cause a lot grief….

Geez, as I stated the last time this came up, why do we need to be QC???

Again the dealer and tech get paid and costs the owner time including a possibly damaged engine. Outstanding!

 

Did you immediately shut down when you go the warning to avoid possible engine damage? At the very least, you need to get to the dealer and have then confirm this is what happened and get it documented so that if you have any future issues with the engine, they will hopefully be on the hook for it.

 

My hybrid Highlander was fine the day before but started it yesterday and the high temp warning came up immediately. Engine wasn't anywhere near operating temp. I will check the fan wire harness and plug but doubt that is the issue.

 

^
Hybrid has two cooling systems one for the engine (larger fill reservoir) and a second one (smaller fill reservoir) for the traction battery power inverter. If electric pump is out on the latter it will show an overheat.