PSA NOx Sensor Guide: Applications and Replacement Basics

PSA NOx sensor is a component in the vehicle’s emissions control system that is responsible for measuring the level of nitrogen oxides (NOx) in the exhaust gas. NOx is a harmful pollutant that is generated when fuel is burned at high temperatures, such as in internal combustion engines. The sensor helps to monitor and reduce the amount of NOx emitted by the vehicle by providing feedback to the engine management system to adjust the air-fuel ratio and reduce emissions.

The PSA NOx sensor works by using a ceramic sensing element that reacts with the NOx in the exhaust gas. The sensor measures the level of oxygen in the exhaust gas before and after the ceramic element, and the difference between the two measurements is used to calculate the level of NOx present in the exhaust gas. The sensor provides this information to the vehicle’s engine control module, which adjusts the fuel injection and ignition timing to reduce the amount of NOx emissions.

The PSA NOx sensor is typically located in the exhaust system, downstream of the catalytic converter. It is a critical component in the vehicle’s emissions control system and is required for the vehicle to meet emissions regulations. A malfunctioning NOx sensor can cause the vehicle to fail emissions tests, reduce fuel efficiency, and potentially cause damage to other components of the vehicle. Regular maintenance and replacement of the NOx sensor as needed can help ensure the vehicle’s emissions remain within acceptable levels and help to protect the environment.

Common PSA NOx sensor OE numbers

1. 1618HW
2. 1618HQ
3. 9678570780
4. 9675358480
5. 5WK96748
6. 5WK96749
7. 5WK9 6745A
8. 5WK9 6746A
9. 5WK9 6747A
10. A2C96290800
11. A2C96290900

It is important to note that different PSA vehicles may have different NOx sensor OE numbers, and some of these numbers may be used for multiple vehicle models. If you need a specific NOx sensor for your vehicle, it is recommended to check with the manufacturer or a reputable automotive parts supplier to ensure that you get the correct part.

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