FITMENT
Compatible with Cummins diesel engines equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include heavy-duty diesel engines used in trucks and industrial equipment where SNS3502 is specified.

Reference / part number:

• SNS3502
• FP507676

Designed for SCR exhaust aftertreatment systems used in modern diesel emission control setups.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) levels in the exhaust system and sends data to the ECU to regulate AdBlue/DEF injection and reduce emissions.

Q2: Where is it installed?
A2: It is mounted in the exhaust aftertreatment system, typically before or after the SCR catalytic converter depending on engine configuration.

Q3: What are symptoms of failure?
A3: Check engine light, SCR/AdBlue system warnings, NOx sensor fault codes, reduced engine performance, or engine derating (limp mode).

Q4: Is SNS3502 interchangeable with other Cummins NOx sensors?
A4: No, it is application-specific. Compatibility depends on engine model, emission stage (EPA/Euro standard), and ECU calibration.