Monitor Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
When the operating angle of the ball valve of the water control valve goes beyond the stopper, breakage or disconnection of the water control valve shaft or misalignment of the ball valve position sensor is judged, and the ECM illuminates the MIL and stores a DTC.