While most Doosan technical manuals link VPV001-05 to the hydraulic pump valve, some field reports occasionally associate similar codes with engine coolant temperature sensor malfunctions. If you do not find issues with your pump valve, it is worth verifying that your coolant levels are adequate and the sensor is functioning correctly. JustAnswer
: Measure the resistance across the pump proportional valve pins (typically expected to be around 25 raised to the composed with power C ) to verify if the solenoid is within spec. Check Power doosan code vpv001-05