Drain a small amount of coolant from the radiator plug so the level drops below the sensor port.
: A malfunction within the pump's proportional pressure-reducing valve or its internal solenoid coil.
Chafed wires rubbing against the excavator chassis or frame. doosan code vpv001-05
Unplug the connector to the engine coolant temperature sensor. Check for corrosion, bent pins, or water intrusion. Clean with contact cleaner if necessary. 3. Test the Sensor If the wiring seems fine, the sensor itself may be faulty.
Main Hydraulic Pump Proportional Pressure Reducing Valve (P/V-A) EPOS / Electro-Hydraulic Flow Control Failure Mode Current Below Normal / Open Circuit Common Equipment Drain a small amount of coolant from the
If the coil passes the resistance test, the issue resides in the wiring loom heading back to the EPOS controller. Test for continuity from the pump connector back to the main fuse box/controller terminal to find the location of the severed or grounded wire. Summary of Resolution Actions Root Cause Identified Corrective Action Required Cab switch out of position Damaged or corroded plug pins
Identify by referencing your unit's serial schematics manual. Unplug the connector to the engine coolant temperature
The VPV001-05 error code specifically indicates a .
Run a long jumper wire from the solenoid's harness plug back to the corresponding controller harness pin.
Disclaimer: The diagnostic and repair information provided in this article is for informational and reference purposes only. Heavy equipment repair can be dangerous. Always refer to your machine's official service manual, observe all safety protocols, and consult with a certified Doosan technician before performing any major repairs.