What is the lambda sensor?

The lambda sensor is located in the front section of the exhaust system between the exhaust manifold and the catalytic converter. It measures the residual oxygen content in the exhaust gases and sends a signal to the engine management system, which then precision-adjusts the air-fuel mixture by means of the mixture forming device, i.e. the fuel injection system. This "closed-loop control circuit" ensures the optimum mixture ratio is maintained at all times. At the same time, it controls both the optimum conversion rate for the catalytic converter and guarantees optimum performance.

Last update on 2013-07-05 by Stefen Baetge.

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