How do pre oxygen sensors work?
Oxygen sensors work by producing their own voltage when they get hot (approximately 600°F). When the outside of the bulb is exposed to the hot gases of the exhaust, the difference in oxygen levels between the bulb and the outside atmosphere within the sensor causes voltage to flow through the bulb.
What does a pre cat oxygen sensor do?
Most cars have at least two oxygen sensors located throughout the exhaust system; at least one in front of the catalytic converter and one or more downstream from the catalytic converter. The “pre-cat sensor” regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter.
What do you use an oxygen sensor for?
The pre- and post-catalytic converter oxygen sensors are part of these requirements. The pre-catalytic converter oxygen sensor is used for fuel trim and the post-catalytic converter oxygen sensor is used to monitor converter efficiency.
Is the after catalyst oxygen sensor used for engine mixture control?
Is the after catalyst oxygen sensor used for engine mixture control? People have often stated that the oxygen sensor installed behind the catalytic converter in a common gasoline engine setup has only one function: to test the health of the catalytic converter. Specifically, that it plays no role in engine mixture control.
Where is the O2 sensor on a catalytic converter?
Go to the drop-down menu bar at the lower left corner of the Waveform Library window and select, Oxygen / O2/ Lambda sensor. A lambda sensor is also referred to as an Oxygen or O 2 sensor, or a Heated Exhaust Gas Oxygen (HEGO) sensor, and plays a very important role in control of exhaust emissions on a catalytic-equipped vehicle.
Can a oxygen sensor affect engine performance and fuel economy?
Can an oxygen sensor affect engine performance and fuel economy? Simple answer: Yes. The oxygen sensor drives fuel trim and fuel trim is all about fuel economy. Good fuel and good maintenance are keys to long component life and fuel economy.
The pre- and post-catalytic converter oxygen sensors are part of these requirements. The pre-catalytic converter oxygen sensor is used for fuel trim and the post-catalytic converter oxygen sensor is used to monitor converter efficiency.
When did oxygen sensors become a global requirement?
A single sensor was installed into the exhaust stream to modify fuel delivery and maintain catalytic converter efficiency. Beginning January 1, 1996, OBD II became a global requirement. The pre- and post-catalytic converter oxygen sensors are part of these requirements.
Go to the drop-down menu bar at the lower left corner of the Waveform Library window and select, Oxygen / O2/ Lambda sensor. A lambda sensor is also referred to as an Oxygen or O 2 sensor, or a Heated Exhaust Gas Oxygen (HEGO) sensor, and plays a very important role in control of exhaust emissions on a catalytic-equipped vehicle.
What happens if an oxygen sensor fails to function?
If your oxygen sensor fails to function properly, your engine management computer cannot determine the air to fuel ratio. Therefore, the engine is forced to guess how much gasoline to use, resulting in a polluted engine and a poorly functioning vehicle.