What is the role of oxygen sensors in a vehicle?

Oxygen sensors play a crucial role in monitoring the level of oxygen in the exhaust gases emitted from a vehicle's engine. These sensors are essential for optimally managing the air-fuel mixture that enters the engine. By measuring the oxygen content in the exhaust, the sensors provide feedback to the engine control unit (ECU). This feedback helps the ECU adjust the amount of fuel injected into the engine, ensuring that the combustion process is efficient, which leads to lower emissions and improved fuel economy.

The accurate monitoring and regulation of the air-fuel mixture also contribute to meeting environmental regulations by reducing harmful emissions such as hydrocarbons, carbon monoxide, and nitrogen oxides. This functionality makes oxygen sensors vital components in modern vehicles, as they help maintain engine performance and compliance with safety and emissions standards.