What does a heat oxygen sensor do?
The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It tells the computer if the fuel mixture is burning rich (less oxygen) or lean (more oxygen).
What is the code for heated oxygen sensor?
P0135 – Heated oxygen sensor (HO2S) 1, bank 1, heater control – circuit malfunction Trouble Code Fault Location Probable Cause P0135 Heated oxygen sensor (HO2S) 1, bank 1, h Fuse, wiring, H025, ECM
How does the heated oxygen sensor ( ho2s ) work?
The sensor compares amount of oxygen in the exhaust to the surrounding air (there is an opening in the sensor that is exposed to the atmosphere). It generates a corresponding voltage which is transmitted to the PCM. The PCM then controls injector pulse based on this value. Modern vehicles use a heated oxygen sensor (HO2S).
How does a heated oxygen sensor work in a PCM?
These sensors contain a heating element that brings the sensor to operating temperature faster. This allows the PCM to use the signals input sooner, for more precise fuel control and reduced emissions. The heater circuit is energized through a relay that closes when the engine is cranked.
What happens if the heater on an oxygen sensor goes bad?
If the heater circuit in a sensor goes bad, the sensor will not function properly. Heater circuit issues are in fact a common source of OBDII codes. In order to do their jobs, all oxygen sensors must be exposed to a constant stream of harmful exhaust gasses, extreme heat and high velocity particulates.
What is the purpose of a heated oxygen sensor?
The purpose of the heated element in the oxygen sensor is to quickly bring it up to normal operating temperature after your MKZ has been started. When it goes bad, it is more difficult for the engine to get the air fuel mixture right.
What does a heated oxygen sensor do?
The heated oxygen sensor senses the oxygen concentration in the exhaust gas and, converts it into a voltage which is sent to the ECM.
When should the oxygen sensor be replaced?
As a thumb rule, you may consider replacing your oxygen sensors every 65,000 to 90,000 miles , if your vehicle is less than 15 years old. This will reduce pollution and keep your car engine running efficiently. If your car is older than 15 years, it is best to replace the O2 sensors every 50,000 to 65,000 miles.
How do you test an oxygen sensor heater?
Testing oxygen sensors heater circuit can be performed by disconnecting the sensor connector and connect a voltmeter between the heater voltage supply wire (harness side) and ground. With the ignition switch on 12 V should be seen on your meter.