For about 1.5 years, my coolant display has been showing warnings that the coolant level is low and I should drive to the right. However, there is no loss, rather a vacuum builds up, so that after opening the coolant filler nozzle air flows in and the coolant level builds up again. There are no discolorations on the filler nozzle or liquid losses on or under the engine. About 2 years ago, Volvo thought it could be due to the defective rubber seal on the lid of the E In the late summer of 2020, the same thing happened again and the routes that could be driven without reading the pressure were getting shorter and shorter, from 100km to the last 10km. Then again to Volvo there again large checks (incl. repeated pressure test – without error source). An exchange of the hoses to the coolant balance tank brought peace until 1 week ago. Has anyone already had similar experiences or knows remedy? V Thank you!