Also known as the O2 sensor because O2 is the chemical formula for oxygen, the oxygen sensor monitors how much unburned oxygen is present in the exhaust as exhaust exits the engine.

The O2 sensor is in the exhaust flow, so it is affected by contaminants in that environment. Bad fuel, a poorly tuned engine, or excessive heat can shorten the life of O2 sensors ...

We drill holes in an exhaust header to demonstrate how even the tiniest exhaust leak can affect O2 sensor accuracy and yield unreliable tuning data.

What Is An Oxygen Sensor? Oxygen sensors, also known as O2 sensors, monitor how much unburned oxygen is left over after the exhaust exits the engine. They provide a means of measuring the fuel mixture ...

Q:Hi James. I keep having an oxygen sensor fault code for a lean exhaust with my '97 Corvette. I've taken the vehicle to the dealer several times but the problem keeps recurring. I would like to ...

Every O2 sensor works by comparing exhaust gas to outside air—the difference in oxygen levels creates a voltage that's read by the car's computer. As a result, ...

A new oxygen sensor to replace the faulty one; An Oxygen sensor socket; Hand gloves; Replacing The Faulty Sensor. Since the vehicle may have between 2 to 4 sensors, use the OBD II scan tool to ...

If you don't have a custom exhaust, you can find an O2 sensor, unscrew it, and attach your pressure gauge. Testing back pressure is a two-person job.

An oxygen sensor is a fairly innocuous-looking device, about the size and shape of a small child's finger. The body of the device is made from a zirconia ceramic with a metal base that screws into ...

Your vehicle's O2 sensor plays a significant role in its performance and if it's faulty, it's not something you should ignore. Here's what you need to know.