What is a nox sensor?

A NOx sensor, or nitrogen oxide sensor, is a device used in vehicles to monitor and measure the level of nitrogen oxides in exhaust gas. These sensors are typically found in diesel engines and are used to ensure compliance with emissions regulations.

NOx sensors work by detecting the presence of nitrogen oxides in the exhaust gas stream and sending a signal to the vehicle's engine control unit (ECU). The ECU can then adjust the air-fuel ratio and other parameters to reduce the emissions of nitrogen oxides.

NOx sensors are important for reducing harmful emissions and improving air quality. They are required in many regions to meet emissions standards, and failing to properly maintain or replace a malfunctioning NOx sensor can lead to increased emissions and potential fines or penalties.

Overall, NOx sensors play a crucial role in ensuring that vehicles are environmentally responsible and compliant with emissions regulations.