KUBOTA-P0401 moderate Kubota ›

EGR Flow - Insufficient

The KUBOTA-P0401 (Kubota) diesel fault code means: EGR Flow - Insufficient. This is a moderate severity code.

My Garage →
Keep driving?
Yes, with caution
DIY difficulty
intermediate
Estimated cost
$60-$160 cleaning, $650-$1,400 EGR valve

What Are the Symptoms of KUBOTA-P0401?

  • MIL on, mild derate possible
  • Soot-load warnings may follow

What Causes KUBOTA-P0401? (Most Likely First)

  • EGR valve carboned closed (classic V3307/V3800 issue) Very Likely
  • Plugged EGR cooler Likely

Can I Still Drive with KUBOTA-P0401?

Yes, with caution. KUBOTA-P0401 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is Kubota code P0401?

Kubota P0401 means: EGR Flow - Insufficient. Moderate code. Keep working cautiously and plan repair.

Can I keep using my Kubota with P0401?

Moderate fault -- continue light use, fix at next service. Use Kubota Diagmaster software (dealer tool) for full diagnostics.

How much does P0401 cost to fix on a Kubota?

Repair cost range: $60-$160 cleaning, $650-$1,400 EGR valve. Compact-tractor labor is typically $110-$150/hr in 2026.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose KUBOTA-P0401?

  1. Remove EGR and inspect; carbon can glue flapper shut.

  2. Walnut-blast or chemically clean.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0401 as a generic OBD-II code)

P0401 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 P0401 Bobcat moderate EGR Insufficient Flow Detected Duramax moderate Exhaust Gas Recirculation Flow Insufficient Detected Hino moderate EGR Flow Insufficient Isuzu moderate EGR Flow Insufficient PACCAR moderate EGR Flow Insufficient Power Stroke moderate Exhaust Gas Recirculation Flow Insufficient Yanmar moderate EGR Insufficient Flow Detected

Which Vehicles Commonly Get KUBOTA-P0401?

  • Kubota BX1880 / BX2380 / BX23S sub-compact tractors
  • Kubota L2501 / L3301 / L3901 utility tractors
  • Kubota L4060 / L4760 / L5060 / L5460 grand L tractors
  • Kubota M5-091 / M5-111 utility tractors
  • Kubota M6S-111 / M7060 / M7-132 / M7-152 tractors
  • Kubota MX5400 / MX6000 utility tractors
  • Kubota SVL65-2 / SVL75-2 / SVL95-2s skid steer loaders
  • Kubota SSV65 / SSV75 skid steer loaders
  • Kubota RTV-X1100C / RTV-X1140 / RTV1140CPX utility vehicles
  • Kubota generator sets (GL, GR, SQ series)

Explore More

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

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