autogeek

Hi everyone, I have lexus nx300h 2018, it showing triangle with this message "parking assist malfunction visit your dealership". 1st common thought was to find a faulty sensor which isn't the case. then we checked the wiring looms which seems fine, only thing is front radar left which I think nothing to do with this fault. banging my head not sure what else to check??? anyone can help or provide technical solution what else to do.