The engine coolant bypass valve has malfunctioned. this is caused a faulty part that toyota knows malfunctions often in their toyota rav4 for multiple years including the 2019. It can cause problems for the engine cooling component, meaning the vehicle overheats, as well as affects the cars internal A/C. It can only be diagnosed at the dealership, not through a normal diagnostic. There is currently a class action lawsuit, and many others owners of multiple years of the toyota rav4 have the same issue.