Checking and replacing lambda probes is a vital procedure for monitoring exhaust gas composition and ensuring the engine management system functions correctly. Lambda probes (oxygen sensors) monitor the air-fuel ratio in the combustion chambers and transmit this data to the electronic control unit. Malfunctioning or contaminated sensors lead to increased fuel consumption, unstable engine operation, elevated emissions, and dashboard error lights.

During service, lambda probe diagnostics are performed, including signal and accuracy testing, and if necessary, replacement with new original or certified components. This maintains an optimal combustion mode, improves fuel economy, and reduces harmful emissions.