BOBCAT-P0402 moderate Bobcat ›

EGR Flow Excessive

The BOBCAT-P0402 (Bobcat) diesel fault code means: EGR Flow Excessive. This is a moderate severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$100-$700

What Are the Symptoms of BOBCAT-P0402?

  • Black smoke under load
  • Slight derate

What Causes BOBCAT-P0402? (Most Likely First)

  • EGR valve stuck open (carbon) Very Likely
  • EGR position sensor out of calibration Possible

Can I Still Drive with BOBCAT-P0402?

Yes, but fix soon. BOBCAT-P0402 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 P0402?

Bobcat P0402: EGR Flow Excessive. This code is reported on Bobcat equipment running the described engine family.

Can I keep working with Bobcat code P0402?

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

How much does Bobcat P0402 cost to fix?

Estimated repair cost: $100-$700. 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-P0402?

  1. Command EGR to closed; verify position feedback reads 0%.

  2. Remove valve, inspect pintle seat area.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0402 as a generic OBD-II code)

P0402 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 P0402 Duramax moderate Exhaust Gas Recirculation Flow Excessive Detected Hino moderate EGR Flow Excessive Isuzu moderate EGR Flow Excessive PACCAR moderate EGR Flow Excessive

Which Vehicles Commonly Get BOBCAT-P0402?

  • 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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