Gordo

My 2020 VX does rev to 1500 for 3-5 Seconds if left to cool right down .told by Toyota it’s a normal warm up procedure but it does it even though ambient temp is 36deg C spoke to Toyota tune up expert who told me it is random in 200 series not all of them do it and he believes it to be a cpu fault and Toyota not admitting there is a problem. Not good for turbos etc . Don’t know what to do any advise is appreciated.