FITMENT:
Compatible with Cummins diesel engines equipped with SCR (AdBlue/DEF) emissions systems, commonly used in heavy-duty trucks, including:

• Cummins ISX / ISX15 (EPA10 / EPA13 SCR systems)
• Freightliner Cascadia
• Kenworth / Peterbilt heavy-duty trucks
• International truck platforms (depending on SCR configuration)

OEM / Cross reference numbers:

• 2872298
• 2894946
• 1873793
• A1156693A
• 5WK9 6693A / 5WK96693A (Continental sensor reference)

These part numbers belong to the same Cummins SCR NOx sensor family, typically used as inlet or outlet sensors depending on calibration and exhaust layout.

FUNCTION:

• Measures nitrogen oxide (NOx) levels in diesel exhaust gas
• Sends real-time data to ECU/ACM via CAN (J1939 communication)
• Controls AdBlue (DEF) injection for SCR catalyst efficiency
• Helps maintain EPA/Euro emissions compliance and prevent derate

INSTALLATION POSITION:

• SCR system inlet or outlet sensor (application-dependent)
• Mounted between DPF and SCR catalyst or downstream of SCR unit

IMPORTANT NOTE:
Cummins NOx sensors like this are “smart sensors” with integrated electronics, meaning failure can cause communication faults, not just reading errors. Wiring, harness condition, and CAN communication are critical for proper operation.

FAQ:

Q1: Is this inlet or outlet sensor?
A1: It depends on engine and SCR system configuration. This family (2872298 / 2894946 / 1873793) is used in both inlet and outlet positions depending on OEM setup.

Q2: What vehicles use it?
A2: Common in Cummins ISX engines used in Freightliner Cascadia, Kenworth, Peterbilt, and International trucks.

Q3: What are failure symptoms?
A3: SCR/DEF warning, engine derate, incorrect NOx readings, “NOx sensor communication fault,” or limp mode.

Q4: Are all listed part numbers interchangeable?
A4: Yes, they belong to the same SCR NOx sensor family and are often cross-referenced in aftermarket catalogs.

Q5: Does replacement require programming?
A5: Some trucks require SCR reset or ECM adaptation after installation.