3392580X | Genuine Cummins® Outlet Catalyst Module

Reduce Harmful Pollutants

• Converts carbon monoxide (CO), unburned hydrocarbons (HC), and sometimes nitrogen oxides (NOx) into less harmful substances like carbon dioxide, nitrogen, and water vapor.

Assist Diesel Particulate Filter (DPF) Regeneration

• In some designs, it helps raise exhaust temperature to burn off trapped soot in the DPF, keeping the filter clean and efficient.

Meet Emissions Regulations

• Helps vehicles comply with strict emission standards like EPA, Euro 5, Euro 6, or similar local regulations.

Protect the Environment and Health

• By reducing pollutants, it limits air pollution, smog, and health risks associated with diesel exhaust.

Improve Engine Efficiency and Longevity

• Proper emission control prevents soot buildup downstream, reducing stress on other components like the turbocharger or muffler.

Check Engine or DPF Warning Light

• Dashboard lights may illuminate, indicating an aftertreatment problem or inefficient catalyst performance.

Reduced Engine Performance

• The engine may lose power or accelerate sluggishly because a blocked or damaged catalyst restricts exhaust flow.

Increased Fuel Consumption

• The engine may work harder to maintain performance, consuming more fuel than usual.

Excessive Smoke or Unusual Exhaust Color

• Black or dark smoke may appear if the catalyst isn’t properly converting hydrocarbons or assisting DPF regeneration.

Frequent Regeneration Cycles

• If the Outlet Catalyst Module isn’t functioning, the system may attempt DPF regeneration more often, sometimes unsuccessfully.

Strange Smells

• A burning or chemical odor from the exhaust may indicate the catalyst is overheating or failing.

Limp Mode Activation

• Many modern diesel vehicles will reduce engine power to protect the engine if the module is severely blocked or malfunctioning.

Failed Emissions Test

• A malfunctioning outlet catalyst will often cause the vehicle to fail emissions inspections due to higher pollutants in the exhaust.