Engine Coolant Temperature Sensor Performance
The YANMAR-P0116 (Yanmar) diesel fault code means: Engine Coolant Temperature Sensor Performance. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- beginner
- Estimated cost
- $40-$250
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Common Symptoms
- Slow warm-up display, erratic temp gauge
Probable Causes (Ranked by Likelihood)
- Failed ECT sensor Likely
- Stuck thermostat Possible
Step-by-Step Diagnostic Procedure
Scan live ECT warmup rate.
Replace thermostat if slow warmup.
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.
P0116 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: