Yanmar ViO Pilot Pressure Fault
The YANMAR-HYD-PILOT-FAULT (Yanmar) diesel fault code means: Yanmar ViO Pilot Pressure Fault. This is a serious severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $50-$900
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Common Symptoms
- No response to joystick
- Boom drifts, no smooth control
Probable Causes (Ranked by Likelihood)
- Pilot pressure solenoid fault Likely
- Plugged pilot filter (annual) Likely
Step-by-Step Diagnostic Procedure
Check pilot filter element.
Test pilot pressure at test port (spec 30-45 bar).
Scan pilot solenoid command current.
Frequently Asked Questions
What is Yanmar code EXC-PILOT?
Yanmar EXC-PILOT: Yanmar ViO Pilot Pressure Fault. This code is reported on Yanmar equipment running the described engine family.
Can I keep working with Yanmar code EXC-PILOT?
Do not continue operating. Risk of engine damage or unsafe shutdown.
How much does Yanmar EXC-PILOT cost to fix?
Typical repair cost: $50-$900. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Yanmar SmartAssist / YDT) is usually required.