BOBCAT-P0299 serious Bobcat ›

Turbocharger Underboost

The BOBCAT-P0299 (Bobcat) diesel fault code means: Turbocharger Underboost. This is a serious severity code.

My Garage →
Keep driving?
Limited driving only
DIY difficulty
intermediate
Estimated cost
$50-$2,500

What Are the Symptoms of BOBCAT-P0299?

  • Severe power loss / slow cycle times
  • Black smoke under load
  • Turbo whistle changes pitch

What Causes BOBCAT-P0299? (Most Likely First)

  • Split intercooler boot (radiator frame flex) Very Likely
  • Stuck/sooted VGT vanes on Kubota turbo Likely
  • Plugged air filter / plugged DPF creating back-pressure Possible
  • Failed boost pressure sensor Possible

Can I Still Drive with BOBCAT-P0299?

Limited driving only. BOBCAT-P0299 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is Bobcat code P0299?

Bobcat P0299: Turbocharger Underboost. This code is reported on Bobcat equipment running the described engine family.

Can I keep working with Bobcat code P0299?

Limited operation only -- finish the current task then shut down for repair.

How much does Bobcat P0299 cost to fix?

Estimated repair cost: $50-$2,500. 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-P0299?

  1. Pressurize intake with smoke machine and locate leaks.

  2. Scan VGT position command vs. actual; command sweep via Service Analyzer.

  3. Check DPF back-pressure and differential; force regen if indicated.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0299 as a generic OBD-II code)

P0299 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 P0299 Duramax serious Turbocharger Underboost Condition Hino serious Turbocharger Underboost Isuzu serious Turbocharger Underboost / Wastegate Range Kubota serious Turbocharger Underboost PACCAR serious Turbocharger Underboost Perkins serious Turbocharger Underboost Yanmar serious Turbocharger Underboost

Which Vehicles Commonly Get BOBCAT-P0299?

  • 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

Was this helpful?

Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.