YANMAR-P0381 moderate Yanmar ›

Glow Plug Indicator Circuit Malfunction

The YANMAR-P0381 (Yanmar) diesel fault code means: Glow Plug Indicator Circuit Malfunction. This is a moderate severity code.

Unverified. We could not confirm this code's definition against freely available manufacturer documentation, so treat the meaning, severity and fix guidance on this page as unconfirmed. Check it against the manufacturer's service information for your exact model and serial range before acting on it. This page is kept out of search engines for that reason, and we are working through this family manual by manual.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
beginner
Estimated cost
$10-$200

What Are the Symptoms of YANMAR-P0381?

  • Wait-to-start lamp won't illuminate

What Causes YANMAR-P0381? (Most Likely First)

  • Failed indicator bulb / LED driver Likely
  • ECU indicator circuit fault Possible

Can I Still Drive with YANMAR-P0381?

Yes, but fix soon. YANMAR-P0381 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What is Yanmar code P0381?

Yanmar P0381: Glow Plug Indicator Circuit Malfunction.

Can I keep operating with Yanmar code P0381?

Usually drivable short-term, but fix soon.

How much does Yanmar P0381 cost to fix?

Typical cost: $10-$200. Yanmar SmartAssist / YDT diagnostic software is often required.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose YANMAR-P0381?

  1. Bench-test indicator circuit.

  2. Replace bulb/LED.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0381 as a generic OBD-II code)

P0381 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Gas / Automotive (OBD-II) Generic OBD-II definition for P0381 Power Stroke moderate Glow Plug/Heater Indicator Circuit

Which Vehicles Commonly Get YANMAR-P0381?

  • Yanmar SA221 / SA324 / SA424 compact tractors
  • Yanmar YT235 / YT347 / YT359 compact tractors
  • Yanmar LX4100 / LX4900 utility tractors
  • Yanmar ViO17 / ViO25 / ViO35 / ViO45 / ViO55 / ViO80 mini excavators
  • Yanmar B27-3 / B37-3 / B50-3 compact excavators

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More Yanmar codes → Diesel home All diesel codes Heavy-duty Guides

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