This will most likely increase the fuel consumption, and subsequently, the polluting emissions.Įventually, this may lead to the clogging of the catalytic converter, which you will then have to replace. If the lambda sensor is defective, no data will be sent to the ECU, which will then use faulty information. This is essential in decreasing polluting emissions.

That way, the vehicle’s Electronic Control Unit (ECU) which controls some functionalities of the engine, will receive the correct data on the emissions, and it will then release the exact quantity of gas needed. How does it work?Īs the lambda sensor is placed before the catalytic converter, it can measure the amount of air and fuel in the unburnt hydrocarbons after the combustion. Therefore, the lambda sensor ensures that your car complies with the European regulations on pollution and CO2 emissions. This will also impact the harmful gas emissions rate by making sure the catalytic converter is working correctly. The lambda probe will adjust the fuel amount that is sent to the engine cylinders by optimizing the air and fuel mixture, which in turn will make the engine work properly. In that case, the second sensor will be located right behind the catalytic converter. If you own a newer car, it will be equipped with 2 lambda sensors. The lambda sensor, also called an oxygen sensor, is a small probe located on the car exhaust, between the exhaust manifold and the catalytic converter.

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