Only if it is not working.
you have 2 of them. they are located before and after the catalytic converter
it is an oxygen sensor. located at before the catalytic converter to measure the amount of air fuel mixture. the term "lambda" is used since it uses a mathematical equation to determine this measure.
All Down stream Lambda sensors are located(screwed into) the exhaust pipe, after the catalytic converter( usually with in a footafter the cat.).
The lambda sensor on a Peugeot 307 is typically located in the exhaust system, specifically before and after the catalytic converter. The upstream (pre-catalytic) sensor is generally found near the engine, attached to the exhaust manifold or pipe, while the downstream (post-catalytic) sensor is positioned after the catalytic converter. Depending on the engine type, the exact placement may vary slightly, so consulting the vehicle's service manual can provide precise details for your specific model.
That would be the O2 sensor after the catalytic converter. This sensor monitors the efficiency of the catalytic converter.
The oxygen sensor on a 1999 Honda Civic is located on top of the catalytic converter. The catalytic converter is under the car.
Usually after your catalytic converter. Usually after your catalytic converter.
The second oxygen sensor is now used downstream of the catalytic converter to monitor converter operating efficiency.
Bank 1 sensor 2 is the sensor after the catalytic converterBank 1 sensor 2 is the sensor after the catalytic converter
the lambda sensor senses how much unburnt fuel is coming through in the exhaust gases so that the ECU can regulate it and preserve the correct emissions, usually if the lambda sensor is faulty your EML "Engine Managment Light" will illuminate when the car is under load, eg, on a motorway, also, with a faulty lambda sensor there is a strong possibilty of failing the MOT test and also damaging your catalytic converter
Post is the O2 sensor located behind the converter and Pre is the sensor located in front of the converter. Sometimes also referred to as upstream and downstream.
I believe bank 1 sensor 1 is Passenger side before catalytic converter. sensor 2 is after catalytic converter. bank 2 sensor 1 is Driver side before catalytic converter. sensor 2 is after catalytic converter.