Ford Transit Custom NOx Lambda Sensor Oxygen 2.2 EcoBlue JK21-5L239-AC

Ford Transit Custom NOx Lambda Sensor Oxygen 2.2 EcoBlue is a component from the Lambda sensors and O2 sensors category, designed for precise monitoring of exhaust gas composition in the EcoBlue engine exhaust system. This used OEM Ford part allows for maintaining the factory operating parameters of the powertrain, which translates into stable engine performance and proper interaction with the exhaust gas treatment system.

Specifications and technical data

• SKU: JK21-5L239-AC-1
• Mark: Ford
• Condition: Used
• OEM Part Number: JK21-5L239-AC
• Substitutable numbers: JK21-5L239-AC, JK215L239AC
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The NOx lambda sensor in the Ford Transit Custom with a 2.2 EcoBlue engine is responsible for measuring the mixture composition and nitrogen oxide content in the exhaust gases. Based on the signal from the sensor, the engine control unit adjusts the fuel dose and the operation of the injection system, which helps maintain optimal combustion parameters and the correct operation of emission reduction systems. By maintaining the original signal characteristics, the sensor supports stable operation of emergency modes, adaptations, and OBD diagnostic procedures, facilitating service and subsequent verification of the repair's correctness.

Benefits of using an original NOx lambda sensor

Using an original component from the Lambda sensors and O2 sensors group in a Ford Transit Custom ensures:

• consistency with the factory engine control unit calibration,
• proper interaction with the exhaust gas treatment system,
• stable operating parameters across the full load range,
• easier diagnostics using service testers. Choosing a used OEM component is particularly beneficial for maintenance repairs when you want to maintain the original specification while reducing service costs.

Condition of the item and installation aspects

The offered NOx lambda sensor is in used condition, which allows for an economical replacement of a damaged sensor while maintaining the factory design and connectors. The element is intended for installation in the location specified by the manufacturer, using the original thread and mounting point in the exhaust system. During installation, it is recommended to:

• use the appropriate tightening torque in accordance with the service documentation,
• check the condition of the electrical harness and connectors,
• perform adaptation or clear errors in the control unit after replacement, if required by the service procedure.

Expert support and selection of used electronics

When selecting used components from the sensors and electronics group, it is worth considering not only physical compatibility but also operating parameters and suitability for a specific engine version. If you want to better understand when it is worth opting for used modules and sensors and how to do it consciously, check out our guide: The second life of electronics – when is it worth choosing used engine control units, comfort modules, and parking sensors? Rising service costs make used OEM components a real alternative to new parts. If you are interested in a broader context of saving on repairs while maintaining a reasonable level of quality, the following article will be helpful: Rising repair costs and the boom in used parts – how to save on car service?

Expanding repairs within the Ford exhaust control system

If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other elements from the same group, such as additional probes, oxygen sensors, or exhaust gas composition sensors, check the available parts in the Ford Lambda sensors and O2 sensors category.