Wednesday, December 4, 2013
How to Compare O2 Sensors
A vehicles Powertrain Control Module adjusts the ratio of air and fuel so a vehicle gets the best possible fuel economy. This 02 sensor constantly signals the PCM to inform it of the status of the air and fuel mixture. More than one type of 02 sensor is available for installation.
Zirconia
The most common 02 sensor is the zirconia type; it comes in either heated or unheated versions. Unheated zirconia 02 sensors take a few minutes to work, because they rely on a vehicles exhaust to heat up before they produce a signal. Heated zirconia 02 sensors have a heater circuit inside them. They work in about 60 seconds or less.
Titania
Titania 02 sensors are made up of a different type of ceramic than that found in zirconia 02 sensors. It uses resistance changes to notify the PCM. Only a few vehicles come equipped with Titania 02 sensors.
Wide-band
The signal produced by wide-band 02 sensors switch in direct proportion to the ratio of the air and fuel mixture. The PCM keeps a constant air-to-fuel ratio just by adding or taking away fuel when needed.
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