Engine Coolant Overtemperature
The YANMAR-P0217 (Yanmar) diesel fault code means: Engine Coolant Overtemperature. This is a critical 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.
- Keep driving?
- No — stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $25-$2,500
What Are the Symptoms of YANMAR-P0217?
- Overheat alarm + shutdown timer on ViO excavator
- Marine overheat alarm on Yanmar 4JH / 6LY
What Causes YANMAR-P0217? (Most Likely First)
- Plugged radiator core with chaff/mud (tractor) or clogged raw water strainer (marine) Very Likely
- Failed marine impeller / seawater pump Likely
- Stuck thermostat Possible
- Blown head gasket Less Likely
Can I Still Drive with YANMAR-P0217?
No — stop driving. YANMAR-P0217 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
What is Yanmar code P0217?
Yanmar P0217: Engine Coolant Overtemperature. This code is reported on Yanmar equipment running the described engine family.
Can I keep working with Yanmar code P0217?
Do not continue operating. Risk of engine damage or unsafe shutdown.
How much does Yanmar P0217 cost to fix?
Estimated repair cost: $25-$2,500. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Yanmar SmartAssist / YDT) is usually required.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose YANMAR-P0217?
Tractor/excavator: clean radiator from inside out.
Marine: clear strainer, inspect impeller (annual replacement), confirm heat exchanger flow.
Check thermostat operation.
Pressure-test cooling system.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0217 as a generic OBD-II code)
P0217 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get YANMAR-P0217?
- 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
- Cub Cadet Yanmar Ex3200 / Lx410 compact tractors (rebadged)
- John Deere 17G / 26G / 35G compact excavators (Yanmar powered)
- Takeuchi TB210R / TB216 / TB230 mini excavators (Yanmar powered)
- Hunter / Beneteau / Catalina sailboats with Yanmar 3JH / 4JH
- Trawlers and sport fishing boats with Yanmar 6LY / 6LF series
- Sailboat auxiliaries with Yanmar 2YM / 3YM / 3JH5 diesels
- Commercial fishing vessels with Yanmar 6LY3-UTP
- Yachts with Yanmar 6LY400 / 6LY440 / 8LV common-rail marine diesels
- Workboats with Yanmar 4LV / 4JH series marine propulsion
- Ski boats and express cruisers with Yanmar marine diesels
- Tenders and RIBs with Yanmar 3YM20 / 3YM30 sailboat aux
- Island-hopper ferries with Yanmar 6AYM / 6HYM commercial series
- Tug boats and small workboats with Yanmar 6HAL-HTP / 6HYM
Explore More
Was this helpful?
Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.