KUBOTA-P0406 moderate Kubota ›

EGR Sensor A Circuit High

The KUBOTA-P0406 (Kubota) diesel fault code means: EGR Sensor A Circuit High. This is a moderate severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$350-$900 valve

What Are the Symptoms of KUBOTA-P0406?

  • MIL only

What Causes KUBOTA-P0406? (Most Likely First)

  • Open return to ECM Likely
  • Failed EGR position sensor Likely

Can I Still Drive with KUBOTA-P0406?

Yes, but fix soon. KUBOTA-P0406 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What is Kubota code P0406?

Kubota P0406 means: EGR Sensor A Circuit High. Moderate code -- address promptly to avoid inducement / further damage.

Can I keep using my Kubota with P0406?

Moderate fault -- you can usually finish the job but plan repair soon. Use Kubota Diagmaster software (dealer tool) for full diagnostics.

How much does P0406 cost to fix on a Kubota?

Repair cost range: $350-$900 valve. Compact-tractor labor is typically $110-$150/hr in 2026.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose KUBOTA-P0406?

  1. Check 5V ref and return wires.

  2. Replace EGR valve.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0406 as a generic OBD-II code)

P0406 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 P0406 Duramax moderate Exhaust Gas Recirculation Sensor A Circuit High Hino moderate EGR Sensor A Circuit High Isuzu moderate EGR Sensor A Circuit High

Which Vehicles Commonly Get KUBOTA-P0406?

  • 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

Explore More

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

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