Diesel Engine Error Code P244B: How to Fix It

Hard 3-6 hours High Severity Verified June 2026
Error Code
P244B
Brand
Diesel
Product Type
automotive
Severity
High
DIY Difficulty
Hard
Estimated Fix Time
3-6 hours
Error code P244B indicates your diesel particulate filter (DPF) has excessive differential pressure, meaning it's severely clogged with soot. This restricts exhaust flow and can cause engine damage if not addressed promptly.
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Tools You'll Need

How to Fix Error Code P244B

  1. Safety First and Initial Diagnosis

    Never work on a hot exhaust system - severe burns can occur. Ensure adequate ventilation when working with exhaust components.
  2. Attempt DPF Regeneration

    Do not perform regeneration in enclosed spaces due to extremely hot exhaust temperatures and emissions.
  3. Check DPF Pressure Sensors

  4. Inspect DPF Filter Physically

    Wear safety glasses and gloves when handling the DPF. The filter may be heavy and have sharp edges.
  5. Clean or Replace DPF

    Never use pressure washers or harsh chemicals on DPF filters as this can damage the delicate ceramic matrix.
  6. Clear Codes and Test

Parts You May Need

Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
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Exhaust gaskets and clamps
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DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
Diesel Particulate Filter (DPF)
Check Price on Amazon
DPF differential pressure sensor
Check Price on Amazon
Exhaust gaskets and clamps
Check Price on Amazon
DPF cleaning solution
Check Price on Amazon
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When to Call a Professional

Call a diesel mechanic if the DPF requires professional cleaning equipment, if you're uncomfortable working with exhaust systems, or if the code returns after DPF replacement. Professional diagnosis may be needed if multiple exhaust system codes are present.

Frequently Asked Questions

Can I drive with P244B error code?
You should avoid driving except to get to a repair facility. Continued driving with a severely clogged DPF can cause engine damage, reduced power, and potential exhaust system failure.
How much does it cost to fix P244B code?
Professional DPF cleaning costs $300-600, while DPF replacement ranges from $1,500-4,000 depending on the vehicle. DIY cleaning solutions cost $50-150 but require proper equipment.
What causes DPF to clog so badly?
Frequent short trips, poor quality diesel fuel, faulty fuel injectors, or ignoring previous DPF warning lights can cause severe clogging. City driving without highway speeds prevents natural regeneration.
How long does a DPF last before replacement?
Most DPF filters last 100,000-150,000 miles with proper maintenance. However, severe operating conditions or neglected maintenance can reduce this significantly.
Can I remove the DPF permanently?
Removing the DPF is illegal in most areas and will cause the vehicle to fail emissions testing. It can also trigger additional error codes and affect engine performance.