2290034 | Genuine Paccar® Fuel Pipe Dosing Module

1. Support DPF Regeneration

Injects precise amounts of diesel fuel into the exhaust system to raise exhaust temperature.
This high heat burns off soot and particulates collected in the DPF.
Keeps the DPF clean and functioning, preventing clogs and engine backpressure.

2. Reduce Emissions (NOx & Soot)

Works with DEF (Diesel Exhaust Fluid) injection in SCR systems.
Helps convert harmful nitrogen oxides (NOx) into harmless nitrogen and water.
Ensures the engine meets EPA / Euro emissions regulations.

3. Precision Fuel or DEF Dosing

Delivers exact volumes of fluid at precise timing under high pressure.
Prevents over-fueling or under-dosing, which can damage components or increase emissions.

4. Communicates with ECM

Works in sync with the Engine Control Module.
Receives data from sensors (temperature, pressure, NOx) to calculate how much fluid to inject.

5. Enable Reliable Long-Distance Operation

Helps ensure the aftertreatment system functions properly over long hauls.
Prevents power loss, poor fuel economy, and unplanned downtime due to clogged filters.

1. Check Engine Light / Emissions Warning

Illuminated dashboard lights related to emissions or the aftertreatment system.
DTCs (Diagnostic Trouble Codes) such as P20E8, P207F, P2002, etc.

2. Failed DPF Regeneration

The module can’t inject fuel to raise exhaust temperature.
Leads to soot buildup and a clogged DPF.
May trigger forced or failed regens.

3. Excessive Soot or Smoke from Exhaust

Incomplete combustion or fuel dosing may result in black smoke or visible soot.

4. Reduced Engine Power / Limp Mode

Engine may derate to protect itself from damage due to poor aftertreatment performance.
Noticeable drop in torque, acceleration, or max speed.

5. Poor Fuel Economy

Overdosing or malfunction can waste fuel or DEF, decreasing overall efficiency.

6. Strong Fuel Smell or Leaks

Leaks near the dosing module could signal cracked lines, failed seals, or module failure.

7. Unusual Noises

Clicking, buzzing, or pulsing from the module may indicate a failing injector or internal solenoid.