YANMAR-P2002 serious Yanmar ›

DPF Efficiency Below Threshold

The YANMAR-P2002 (Yanmar) diesel fault code means: DPF Efficiency Below Threshold. This is a serious 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.

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Keep driving?
Limited driving only
DIY difficulty
advanced
Estimated cost
$400-$3,500 clean / $4,000-$7,000 replace

What Are the Symptoms of YANMAR-P2002?

  • Regen lamp, derate on SA424 / LX4900 / ViO80

What Causes YANMAR-P2002? (Most Likely First)

  • Soot loaded DPF (short-duty cycle) Very Likely
  • Ash loaded at service interval (3,000-5,000 hr) Likely
  • Raw fuel contamination from injector leak Possible

Can I Still Drive with YANMAR-P2002?

Limited driving only. YANMAR-P2002 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is Yanmar code P2002?

Yanmar P2002: DPF Efficiency Below Threshold. This code is reported on Yanmar equipment running the described engine family.

Can I keep working with Yanmar code P2002?

Limited operation only -- finish the current task then shut down for repair.

How much does Yanmar P2002 cost to fix?

Estimated repair cost: $400-$3,500 clean / $4,000-$7,000 replace. 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-P2002?

  1. Run parked regen via SmartAssist.

  2. Monitor DPF differential pressure (should drop below 3 kPa post-regen).

  3. If regen fails, professionally clean DPF.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P2002 as a generic OBD-II code)

P2002 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 P2002 Bobcat serious DPF Efficiency Below Threshold Hino serious DPF Efficiency Below Threshold — definition not reliably documented Isuzu serious Particulate Trap Efficiency Below Threshold Kubota serious DPF Efficiency Below Threshold Perkins serious Particulate Filter Efficiency Below Threshold Power Stroke serious DPF Efficiency Below Threshold

Which Vehicles Commonly Get YANMAR-P2002?

  • 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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