Very Quick Guide to Lambda Sensors A lambda sensor is an electronic device that fits into a car exhaust system. It is sometimes called an Oxygen sensor, O2 sensor, or AFR. Its purpose is to send a signal to the ECU (engine control unit) to indicat…

According to the substance used in their sensitive element, are: Zirconium (zirconium oxide) Titanium (titanium oxide) Wideband According to their design: Single-wire lambda sensor Two-wire lambda sensor Three-wire lambda sensor …