BOBCAT-P0401 moderate Bobcat ›

EGR Insufficient Flow Detected

The BOBCAT-P0401 (Bobcat) diesel fault code means: EGR Insufficient Flow Detected. This is a moderate 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.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$0-$800

What Are the Symptoms of BOBCAT-P0401?

  • Regen lamp blinking
  • Slight power loss

What Causes BOBCAT-P0401? (Most Likely First)

  • Sooted EGR valve (short-duty skid-steer work) Very Likely
  • Plugged EGR cooler Likely
  • Failed EGR position sensor feedback Possible

Can I Still Drive with BOBCAT-P0401?

Yes, but fix soon. BOBCAT-P0401 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 Bobcat code P0401?

Bobcat P0401: EGR Insufficient Flow Detected. This code is reported on Bobcat equipment running the described engine family.

Can I keep working with Bobcat code P0401?

Usually drivable short-term, but fix soon to avoid derate or DPF issues.

How much does Bobcat P0401 cost to fix?

Estimated repair cost: $0-$800. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose BOBCAT-P0401?

  1. Command EGR sweep in Service Analyzer, verify position feedback.

  2. Remove valve and inspect for carbon packing -- clean with carb cleaner and soft brush.

  3. Force parked regen when complete.

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 Duramax moderate Exhaust Gas Recirculation Flow Insufficient Detected Hino moderate Exhaust Gas Recirculation Flow Insufficient Detected Isuzu moderate Exhaust Gas Recirculation Flow Insufficient Detected Kubota moderate EGR Flow - Insufficient PACCAR moderate Exhaust Gas Recirculation Flow Insufficient Detected Power Stroke moderate Exhaust Gas Recirculation Flow Insufficient Detected Yanmar moderate EGR Insufficient Flow Detected

Which Vehicles Commonly Get BOBCAT-P0401?

  • Bobcat S650 skid steer loader (Kubota V3800)
  • Bobcat S740 / S750 / S770 / S850 skid steer loaders (Kubota V3800)
  • Bobcat T650 / T750 / T770 / T870 compact track loaders (Kubota V3800)
  • Bobcat E50 / E55 / E60 / E85 mini excavators (Kubota V3800)
  • Bobcat UW56 utility vehicle (Kubota V3800)

Explore More

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

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