Are air fuel ratio sensors interchangeable?
Not all vehicles have sensors with the same output characteristics and these sensors are not interchangeable. Vehicles equipped with an air-fuel ratio sensor have approximately 0.4V constantly applied to the sensor, which outputs a current that varies in accordance with the oxygen concentration in the exhaust gas.
Are all heated oxygen sensors the same?
Physically, there’s no difference between front and back O2 sensors. They function in the same way, but the vehicle’s computer uses the measurements that they take for different purposes. Heated three and four-wire O2 sensors on mid-1980s through mid-1990s applications should be changed every 60,000 miles.
What’s the difference between an air fuel sensor and an oxygen sensor?
The Difference Between Air Fuel Sensor and Oxygen Sensor. There are different types of oxygen sensors, but two of the more common types are: • the narrow range oxygen sensor, the oldest style, simply called the oxygen sensor. • wide range oxygen sensor, the newest style, called the air/fuel ratio (A/F) sensor.
How does the oxygen sensor work in a catalytic converter?
Oxygen and Air/Fuel Ratio Sensors The ECM uses an oxygen sensor to ensure the air/fuel ratio is correct for the catalytic converter. Based on the oxygen sensor signal, the ECM will adjust the amount of fuel injected into the intake air stream.
How does an air fuel ratio sensor work?
The coat of soot on this unheated oxygen sensor reduces its sensitivity to changes in the air/fuel mixture ratio. A/F sensors fall prey to the same ailments as ordinary O2 sensors. A contaminated sensor will not produce an accurate signal or generate an accurate air/fuel mixture reading.
Which is more sensitive AFR or O2 sensor?
Also, the AFR Sensor has a little bit more circuity to enable it to detect more minute variations in the exhaust system air content (more sensitive than the O2 sensor). Therefore, it is able to make better adjustments through the ECM to add or subtract fuel to produce a better mix of air/fuel to maximize efficiency and minimize emissions.