PERKINS-P0299 serious Perkins ›

Turbocharger Underboost

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

My Garage →
Keep driving?
Yes, with caution
DIY difficulty
intermediate
Estimated cost
$25-$90 clamp/hose, $900-$1,800 VGT actuator, $1,400-$2,800 turbo

What Are the Symptoms of PERKINS-P0299?

  • Power derate
  • Slow loader response

What Causes PERKINS-P0299? (Most Likely First)

  • Split boost hose / clamp off Very Likely
  • Sticky VGT actuator Likely
  • Worn turbo cartridge Possible

Can I Still Drive with PERKINS-P0299?

Yes, with caution. PERKINS-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 Perkins fault code P0299?

Perkins P0299 means: Turbocharger Underboost. Serious code -- address promptly to avoid inducement / further damage.

Can I keep operating with Perkins P0299?

Serious fault -- you can move the machine to a shop but don't run it under load. Diagnose with Perkins EST / CAT ET (kin to CAT-badged machines).

How much does it cost to fix Perkins P0299?

Repair cost range: $25-$90 clamp/hose, $900-$1,800 VGT actuator, $1,400-$2,800 turbo.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose PERKINS-P0299?

  1. Pressurize intake tract to 18 psi and leak-check.

  2. Command VGT sweep with Perkins EST.

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

Which Vehicles Commonly Get PERKINS-P0299?

  • CAT and JCB compact wheel loaders with Perkins 854E
  • CAT 244D / 246D / 262D skid steers (Perkins-derived)
  • JCB 3CX / 4CX backhoes with 1104D / 1204E
  • Manitou telehandlers with Perkins 1104D / 1204E
  • Perkins 2506 / 2806 industrial gensets

Explore More

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

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