Description: DPF Outlet Module 6.7L ISB/QSB
Condition: New
Brand: Cummins®
Part Number: A041T545
Vehicle Fitment A041T545:
The DPF (Diesel Particulate Filter) Outlet Module A041T545 is the final section of the particulate filter assembly on Cummins 6.7L engines. While the main body of the DPF traps soot and ash, the outlet module serves as the "exit door" and the primary monitoring station for the exhaust system.
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Housing for Sensors: It contains threaded ports for critical sensors, including the Outlet NOx Sensor and the Exhaust Gas Temperature (EGT) Sensor. These sensors tell the engine's computer (ECM) if the aftertreatment system is working correctly.
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Exhaust Direction: It transitions the large diameter of the DPF canister back down to a standard pipe size (usually 4 or 5 inches) to connect to the rest of the exhaust or the SCR system.
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Pressure Monitoring: It often works with a pressure tube to help measure the "delta pressure" (the difference in pressure between the start and end of the filter) to determine when the DPF needs to be cleaned (Regeneration).
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Signs of Faulty A041T545:
- Cracked Housing or Flanges: Due to extreme heat cycles and vibration, the metal housing or the mounting flanges can develop cracks. This leads to exhaust leaks, which you may notice as black soot streaks on the outside of the aftertreatment assembly.
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Damaged Sensor Threads: A very common issue occurs during sensor replacement where the threaded ports (bungs) become stripped or seized. If a NOx or temperature sensor cannot be seated perfectly, it will cause leaks and false readings.
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Excessive Backpressure: If the internal flow path of the outlet becomes restricted or if the internal baffles fail, it can cause high backpressure, leading to reduced fuel economy and turbocharger strain.
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Fault Codes (Diagnostic Trouble Codes):
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NOx Sensor Errors: (e.g., Code 1887 or 3543) – Often caused by leaks in the outlet module allowing "fresh air" to mix with exhaust, tricking the sensor.
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Temperature Abnormalities: (e.g., Code 3225) – If the module is damaged, the temperature readings may fall out of the expected range during a regeneration cycle.
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Exhaust Smells in the Cab: If the module or its gaskets fail, raw exhaust can escape before reaching the tailpipe, often getting pulled into the vehicle's HVAC system.
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Manufacturer information
Cummins® is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.
Warranty
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