EGR Flow Excessive
The BOBCAT-P0402 (Bobcat) diesel fault code means: EGR Flow Excessive. 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.
- 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?
Command EGR to closed; verify position feedback reads 0%.
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:
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)
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