What/why/how: Downstream O2 sensors (and catalytic converters)

Oxygen, lambda, or air/fuel sensors are a critical but ofttimes overlooked component of fuel injected engines. Further to my video about upstream sensors, here are a few points relating to downstream (after cat) O2 sensors and using them for some basic tests.

First O2 Sensor Basics video: What/why/how: O2 sensor basics & repl...

O2 sensor socket tool Amazon links ~
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Amazon for O2 sensors ~
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OBD2 scan tool shown ~
Review: Review: Vgate iCar2 OBD-II Bluetooth ...
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(Using the above Amazon links helps support my channel and is appreciated!)

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