Tundra Rear Ventilation Issue

Interesting. I had a similar air conditioning malfunction in my 2018 Volvo XC60. A defective connection was causing climate control problems. Have you checked the relevant fuses and relays? Sometimes a simple voltage drop can trigger such errors without signaling a blown fuse.

Thanks for the quick reply! Which connection was it on your Volvo? And when you mention voltage drop, do you mean from the battery or specifically at the rear ventilation flap?

I don’t know the precise location of the bad connection in my Volvo, but it was in the rear climate control circuit. Regarding the voltage drop, I mean specifically at the connection or wiring to the rear ventilation flap. Based on the symptoms, it sounds like something's definitely amiss, and a professional diagnostic might be in order.

Roger that. Appreciate the insight. I'll get it checked out at a workshop. It was a defective plug to the rear ventilation flap. They fixed it for 95€. Thanks again!