YANMAR-P0093 serious Yanmar ›

Fuel System Leak Detected - Large

The YANMAR-P0093 (Yanmar) diesel fault code means: Fuel System Leak Detected - Large. This is a serious severity code.

My Garage →
Keep driving?
No — stop driving
DIY difficulty
intermediate
Estimated cost
$30-$400

What Are the Symptoms of YANMAR-P0093?

  • Hard start, fuel smell, slow priming

What Causes YANMAR-P0093? (Most Likely First)

  • Leaking fuel return line on injector Likely
  • Loose high-pressure fitting on rail or injector Possible

Can I Still Drive with YANMAR-P0093?

No — stop driving. YANMAR-P0093 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 P0093?

Yanmar P0093: Fuel System Leak Detected - Large. This code is reported on Yanmar equipment running the described engine family.

Can I keep working with Yanmar code P0093?

Do not continue operating. Risk of engine damage or unsafe shutdown.

How much does Yanmar P0093 cost to fix?

Estimated repair cost: $30-$400. 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-P0093?

  1. Inspect fuel lines with engine running (safety glasses required).

  2. Smoke-test low-pressure fuel system.

  3. Tighten/replace leaking fittings to Yanmar torque spec.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0093 as a generic OBD-II code)

P0093 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 P0093 Hino serious Fuel System Leak Detected - Large Leak Isuzu serious Fuel System Leak Detected - Large Leak Kubota serious Fuel System Leak Detected - Large

Which Vehicles Commonly Get YANMAR-P0093?

  • 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)

Explore More

More Yanmar codes → Diesel home All diesel codes Heavy-duty Guides

Was this helpful?

Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.