or its circuitry, particularly if the temperature reading is outside normal operating parameters. In either case, the machine is detecting an electrical signal that isn't reaching the expected threshold. Common Symptoms Unexpected drops in hydraulic power. Warning lights or notifications on the main console.

for a pump pressure/velocity (P/V) valve or that there is a fault with the engine coolant temperature sensor circuitry.

: Check the electrical connector on the proportional valve. Look for loose pins, corrosion, or moisture ingress.

Would you like a shorter troubleshooting flowchart or specific test values for a particular Doosan model?

Disclaimer: This article is for informational purposes. Always consult the official Doosan service manual and safety procedures for your specific model year and serial number before performing repairs.

: Locate the P1 pump (often referred to as Pump A) and inspect the solenoid valve and its wiring harness for signs of physical damage, corrosion, or frayed wires.

To resolve a "new" VPV001-05 error on machines like the Doosan DX180LC or DX225 , follow this diagnostic path: