Ford Transit Connect NOx Lambda Exhaust Sensor 1.5 Diesel KV61-5L239-AB

Ford Transit Connect NOx Lambda Exhaust Sensor 1.5 Diesel is a component from the Lambda probes and O2 sensors category, designed for diesel systems in the popular Ford commercial model. It is responsible for the precise measurement of exhaust gas composition and nitrogen oxide content, which has a direct impact on engine performance, exhaust emissions, and the proper operation of exhaust treatment systems in the 1.5 Diesel unit.

Specifications and technical data

• SKU: KV61-5L239-AB
• Mark: Ford
• Condition: Used
• OEM Part Number: KV61-5L239-AB
• Substitutable numbers: KV61-5L239-AB, KV615L239AB, 2350909
• Fuel type: Diesel
• Category: Oxygen Sensors

Function and application in the exhaust system

The NOx lambda sensor in a diesel engine plays a key role in monitoring exhaust gas composition after the filter and/or catalytic converter, transmitting data to the engine control unit. Based on this information, the ECU corrects the fuel dosage, injection system operation, and exhaust treatment regeneration strategy. A properly functioning sensor helps maintain stable idle speed, reduce smoke, and lower fuel consumption during daily operation.

For the 1.5 Diesel unit in the Ford Transit Connect, using the correct NOx sensor is particularly important due to emission standard requirements and the nature of commercial vehicle operation, which is often used in urban cycles. A functional measuring element reduces the risk of the engine entering limp mode, the illumination of engine check lights, and problems with emission inspections.

Benefits of using an original Ford sensor

The original sensor from the Ford group was designed specifically for the operating parameters of the 1.5 Diesel engine in the Transit Connect model. As a result, it provides:

• accurate signal mapping for the engine control unit,
• stable operation across a wide range of temperatures and loads,
• proper compatibility with factory ECU software,
• reduced risk of diagnostic errors compared to replacements with uncertain parameters.

Choosing an original Ford component also means greater predictability of exhaust system behavior after installation – without the need for additional tuning or compatibility experiments.

Product characteristics and installation

The presented sensor belongs to the Lambda probes and O2 sensors category, meaning it is a measuring element operating directly in the exhaust stream. Its design is adapted to the conditions prevailing in a diesel engine exhaust system – high temperature, the presence of soot, and variable loads. The product is offered in a used condition, which allows for economical vehicle repair while maintaining the manufacturer's original specifications.

Before installation, standard service procedures are recommended: checking the thread in the socket, verifying the wiring harness, and performing computer diagnostics after installation. A correctly selected and installed NOx sensor allows for the quick restoration of full exhaust treatment system functionality without the need for costly modifications.

Selection, diagnostics, and technical support

When selecting a NOx lambda sensor for a Ford Transit Connect with a diesel engine, it is crucial to match it to the specific version of the powertrain and exhaust emission system. In practice, this means verifying part markings and compatibility with the controller software. In case of doubt, it is worth using computer diagnostics to confirm that the source of the problem is indeed the sensor, and not, for example, a damaged harness or another exhaust system component.

If you want to better understand when choosing a used electronic component makes sense and how to safely approach the purchase of such components, the following article will be helpful: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the assessment of the condition and selection of used electronic components in a car.

Expanding the exhaust measurement system in a Ford

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

Such an approach allows you to refresh several key components responsible for exhaust emissions simultaneously, which translates into more stable engine operation, fewer errors in the controller's memory, and greater predictability of vehicle operation in the long term.