4394227 | Genuine Cummins® Diesel Particulate Filter For ISB

1. Reduce Particulate Emissions

• Captures tiny carbon particles (soot) from exhaust gases.

• Prevents them from being released into the air.

• Protects the environment and improves air quality.

2. Protect Engine and Exhaust Components

• Prevents excessive soot buildup in the exhaust system.

• Reduces backpressure, which can harm the turbo, EGR, or engine performance.

3. Enable Regeneration

• Stores soot until the DPF regeneration process burns it off.

• Helps maintain a clean, functioning filter.

• Works with sensors like the Exhaust Particulate Sensor (EPS) to manage cleaning cycles.

4. Ensure Compliance with Emissions Regulations

• Modern diesel vehicles must meet EPA, Euro, or other emissions standards.

• The DPF is a legal requirement in most diesel trucks, buses, and off-road equipment.

1. Check Engine or DPF Warning Light

• The DPF warning light may illuminate on the dashboard.

• Messages may include:

  • “DPF Restriction”

  • “Regeneration Required”

  • “DPF Malfunction”

2. Reduced Engine Performance / Limp Mode

• Engine may enter limp mode to prevent damage.

• Noticeable loss of power, slower acceleration, or limited top speed.

3. Frequent or Failed Regeneration

• DPF regeneration cycles may happen more often than normal.

• Active regeneration may fail, leaving the filter clogged.

4. Excessive Exhaust Smoke

• A clogged DPF can cause black smoke during acceleration.

• May also see smoke during idle if soot is not being burned off.

5. Poor Fuel Economy

• Engine may consume more fuel as it struggles to force exhaust through a clogged filter.

6. Unusual Exhaust Odor or Heat

• Hot exhaust or unusual smells near the tailpipe.

• Could indicate excessive soot buildup causing overheating of the filter.

7. Fault Codes via Diagnostic Tool

• Common codes include:

  • P2002: Diesel Particulate Filter Efficiency Below Threshold

  • P242F: DPF Soot Accumulation

  • P2452 / P2458: DPF Pressure / Temperature Sensor Faults