Lexus LS400 power steering growling, leaking fluid, and white smoke on startup with potential solenoid issue on Lexus LS400

Some Lexus LS400 owners report experiencing power steering growling, leaking fluid, and white smoke on startup, which may indicate a potential solenoid problem within the power steering system. These issues could arise from the solenoid's role in the Progressive Power Steering (PPS) system, which is designed to lower fluid pressure at higher speeds to maintain steering responsiveness. If the steering problems persist at all speeds, owners may need to investigate other potential causes. Additionally, a failing solenoid on the steering rack can lead to significant steering issues, but it can be replaced separately from the rack itself. Many Lexus LS400 owners also perform routine maintenance by cleaning the solenoid filter and hoses to alleviate stiffness during low-speed turns or at idle. Therefore, if these symptoms are present, it is advisable to inspect the solenoid and consider cleaning or replacing it to restore proper power steering functionality.