DURAMAX-P244A moderate Duramax ›

Diesel Particulate Filter Differential Pressure Too Low

The DURAMAX-P244A (Duramax) diesel fault code means: Diesel Particulate Filter Differential Pressure Too Low. This is a moderate severity code.

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Keep driving?
Yes, with caution
DIY difficulty
intermediate
Estimated cost
$200-$3,500
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What Are the Symptoms of DURAMAX-P244A?

  • Reduced engine power / limp mode
  • Check Engine Light
  • Poor throttle response
  • Possible DPF regen occurring more often (if DPF-related)

What Causes DURAMAX-P244A? (Most Likely First)

  • Differential pressure hose disconnected or DPF cracked Very Likely
  • Carbon / soot accumulation in EGR system (chronic Duramax issue) Likely
  • Damaged EGR cooler — coolant leak into intake (LLY) Possible
  • Wiring or connector fault to sensor/actuator Possible

Can I Still Drive with DURAMAX-P244A?

Yes, with caution. DURAMAX-P244A is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is P244A on a Duramax?

Duramax code P244A (Diesel Particulate Filter Differential Pressure Too Low) is a moderate-severity diagnostic trouble code triggered by the engine control module when it detects a problem in the associated system. Duramax EGR systems carbon up quickly — many owners install an EGR cleaning schedule every 75K miles.

Is a Duramax P244A safe to drive?

Short-term driving is acceptable, but prolonged limp-mode operation indicates the EGR or DPF system needs service to prevent DPF damage.

How much does it cost to fix P244A on a Duramax?

Typical repair runs $200-$3,500 depending on whether the valve can be cleaned or requires replacement.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose DURAMAX-P244A?

  1. Connect scan tool and check EGR commanded vs. actual position in live data

  2. Command EGR open/closed with bidirectional scanner and verify smooth operation

  3. Remove EGR valve and visually inspect for carbon packing — clean or replace as needed

  4. If EGR cooler is suspect, pressure test for internal leaks (coolant getting into intake)

  5. After cleaning, clear code and monitor for return — if returns, consider a replacement EGR valve

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P244A as a generic OBD-II code)

P244A on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Hino moderate DPF Differential Pressure Too Low Isuzu moderate DPF Differential Pressure Too Low Kubota moderate Diesel Particulate Filter Differential Pressure Too Low

Which Vehicles Commonly Get DURAMAX-P244A?

  • 2007.5-2010 Chevy Silverado 2500/3500 HD 6.6L Duramax LMM
  • 2007.5-2010 GMC Sierra 2500/3500 HD 6.6L Duramax LMM
  • 2011-2016 Chevy Silverado 2500/3500 HD 6.6L Duramax LML
  • 2011-2016 GMC Sierra 2500/3500 HD 6.6L Duramax LML
  • 2017+ Chevy Silverado 2500/3500 HD 6.6L Duramax L5P
  • 2017+ GMC Sierra 2500/3500 HD 6.6L Duramax L5P

Explore More

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

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