how to oxygen sensors work detele
00's oxygen sensors started to give way to more precise air fuel ratio sensors. Air fuel (A/F) ratio sensor An air fuel ratio (A/F) sensor measures oxygen content of the exhaust in a wider range. Looking similar to a conventional oxygen sensor, the A/F sensor has more wires. It is also known as "broadband lambda sensor" or "lambda probe." The air fuel ratio sensor is installed in the exhaust manifold or in the front exhaust pipe, before the catalytic converter. The job of the air fuel ratio sensor is to measure the oxygen content in the exhaust and provide feedback to the engine computer (PCM). Based on air fuel ratio sensor signal, the computer adjusts the air to fuel ratio to keep it at the optimum level, which is about 14.7:1. Air fuel ratio sensor problems Problems with air fuel ratio sensors are common. Often a sensor gets contaminated or simply fails. In some cars, the heating element inside the sensor fails causing the malfunction. For exa...
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