John Deere NOx Sensors
John Deere NOx sensors measure nitrogen oxide levels in diesel exhaust systems and play an important role in SCR (Selective Catalytic Reduction) emissions control. These sensors send exhaust gas data to the engine control module so the system can regulate DEF dosing and maintain emissions compliance. At Advanced Truck Parts, we supply John Deere NOx sensors designed for reliable operation in agricultural and industrial diesel equipment.
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John Deere NOx Sensors in SCR Aftertreatment Systems
SCR-equipped John Deere engines rely on NOx sensors to monitor nitrogen oxide levels in the exhaust stream. The engine control module uses this information to control Diesel Exhaust Fluid injection and verify that the SCR catalyst is reducing emissions effectively.
Most modern systems use two sensors:
- Upstream NOx sensor positioned before the SCR catalyst
- Downstream NOx sensor positioned after the SCR catalyst
Together, these sensors help ensure proper emissions performance and provide diagnostic data for the engine control system.
Common John Deere Engine Applications
John Deere NOx sensors are used across a variety of PowerTech diesel engines found in agricultural, construction, and industrial equipment.
- John Deere PowerTech 4.5L engines
- John Deere PowerTech 6.8L engines
- John Deere 9.0L diesel engines
- John Deere tractors, harvesters, and heavy equipment
Sensor design and wiring connectors may vary depending on engine generation and emissions configuration.
Common NOx Sensor Failure Symptoms
- Emissions or aftertreatment warning lights
- NOx sensor fault codes
- Incorrect DEF dosing
- Engine derate or reduced power
- SCR efficiency faults
NOx sensors may fail due to extreme heat exposure, contamination from exhaust deposits, damaged wiring, or internal electronic faults. Replacing a faulty sensor helps restore proper aftertreatment monitoring and emissions system performance.
Verify Fitment Before You Buy
NOx sensors vary depending on engine model, equipment platform, and emissions configuration. To confirm compatibility before ordering, provide:
- Engine serial number
- Equipment model
- Current NOx sensor part number
- Photos of the sensor or connector if available
This information helps ensure the correct John Deere NOx sensor is selected for your application.
Why Buy John Deere NOx Sensors from Advanced Truck Parts?
- Fitment verification before purchase
- Reliable emissions system components
- Fast shipping to reduce equipment downtime
- Support for repair shops and equipment owners
- Competitive pricing on diesel aftertreatment parts
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