Lambda sensors, also known as oxygen sensors, are crucial components in modern vehicles. Their primary function is to monitor the oxygen content in the exhaust gases and relay this information to the engine’s electronic control unit (ECU). Based on this data, the ECU can adjust the air-fuel mixture to ensure optimal engine performance and minimize emissions.
Checking a lambda sensor involves measuring its voltage output under different engine operating conditions. A properly functioning lambda sensor should produce a fluctuating voltage signal that switches between high and low values. A faulty lambda sensor may exhibit a fixed voltage output or slow response time, affecting the engine’s ability to maintain the correct air-fuel ratio.
