CAT NOx Sensors
Caterpillar NOx sensors monitor nitrogen oxide levels in diesel exhaust systems and help ensure proper operation of SCR aftertreatment systems. These sensors provide critical data to the engine control module so the system can regulate DEF dosing and emissions performance. At Advanced Truck Parts, we supply Caterpillar NOx sensors designed for reliable operation in heavy-duty diesel engines.
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Caterpillar NOx Sensors for SCR Aftertreatment Systems
NOx sensors measure nitrogen oxide levels in the exhaust stream before and after the SCR catalyst. This data allows the engine control module to adjust Diesel Exhaust Fluid dosing and maintain emissions compliance.
Common Caterpillar Engine Applications
Caterpillar NOx sensors are commonly used on diesel engines operating in heavy-duty trucks and industrial equipment.
- Caterpillar C13 diesel engines
- Caterpillar C15 diesel engines
- Caterpillar C18 heavy-duty engines
- Vocational trucks and industrial machinery
These sensors are engineered to communicate with the engine ECU and aftertreatment control systems used on Caterpillar platforms.
Common NOx Sensor Failure Symptoms
- SCR or emissions system warning lights
- NOx sensor fault codes
- Incorrect DEF dosing
- Engine derate conditions
- Aftertreatment system efficiency faults
NOx sensors may fail due to contamination, heat exposure, wiring damage, or internal electronic faults. Replacing a faulty sensor helps restore proper emissions monitoring and aftertreatment performance.
Verify Fitment Before You Buy
NOx sensors vary depending on engine model, emissions configuration, and equipment application. To confirm compatibility before ordering, provide:
- Engine serial number
- Truck or equipment model
- Current NOx sensor part number
- Photos of the sensor or connector if available
This information helps ensure the correct Caterpillar NOx sensor is selected for your application.
Why Buy Caterpillar NOx Sensors from Advanced Truck Parts?
- Fitment verification before purchase
- Reliable replacement emissions components
- Fast shipping to reduce equipment downtime
- Support for fleets, repair shops, and equipment owners
- Competitive pricing on aftertreatment system parts
