YANMAR-P0116 moderate Yanmar ›

Engine Coolant Temperature Sensor Performance

The YANMAR-P0116 (Yanmar) diesel fault code means: Engine Coolant Temperature Sensor Performance. 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
$40-$250

What Are the Symptoms of YANMAR-P0116?

  • Slow warm-up display, erratic temp gauge

What Causes YANMAR-P0116? (Most Likely First)

  • Failed ECT sensor Likely
  • Stuck thermostat Possible

Can I Still Drive with YANMAR-P0116?

Yes, but fix soon. YANMAR-P0116 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 P0116?

Yanmar P0116: Engine Coolant Temperature Sensor Performance.

Can I keep operating with Yanmar code P0116?

Usually drivable short-term, but fix soon.

How much does Yanmar P0116 cost to fix?

Typical cost: $40-$250. Yanmar SmartAssist / YDT diagnostic software is often required.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose YANMAR-P0116?

  1. Scan live ECT warmup rate.

  2. Replace thermostat if slow warmup.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0116 as a generic OBD-II code)

P0116 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 P0116 Duramax moderate Engine Coolant Temperature Circuit Range/Performance Kubota moderate Engine Coolant Temperature Sensor - Performance MaxxForce moderate ECT Sensor Performance

Which Vehicles Commonly Get YANMAR-P0116?

  • 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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