Camshaft Position Sensor Circuit
The YANMAR-P0340 (Yanmar) diesel fault code means: Camshaft Position Sensor Circuit. This is a serious severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $100-$350
What Are the Symptoms of YANMAR-P0340?
- Hard start, sync fault
What Causes YANMAR-P0340? (Most Likely First)
- Failed CMP sensor Likely
- Loose or dirty CMP connector Possible
Can I Still Drive with YANMAR-P0340?
No — stop driving. YANMAR-P0340 is rated serious 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 P0340?
Yanmar P0340: Camshaft Position Sensor Circuit. This code is reported on Yanmar equipment running the described engine family.
Can I keep working with Yanmar code P0340?
Do not continue operating. Risk of engine damage or unsafe shutdown.
How much does Yanmar P0340 cost to fix?
Estimated repair cost: $100-$350. 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-P0340?
Scan CMP signal during crank.
Inspect connector; replace sensor if output missing.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0340 as a generic OBD-II code)
P0340 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-P0340?
- 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)
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