Genuine Mazda 929 Oxygen Sensor

Mazda 929 Oxygen Sensor Parts and Q&A

• Oxygen Sensor
  JE08-18-861B
  Q: How does the oxygen sensor function within a vehicle's closed loop feedback control system on Mazda 929?

  A:

  Being a part of the closed loop feedback control system of the vehicle, the oxygen sensor detects the concentration of oxygen in exhaust gas, which is comprised of a closed-end tube constructed of ceramic zirconia with porous platinum electrodes that cover the inside and outside of the tube. The exhaust gases are passed over the outer surface in the exhaust manifold or beyond the turbo charger. The sensor sends an electrical signal to the engine control unit after sensing the amount of oxygen. In gasoline engines the oxygen sensor is fitted in the exhaust manifold or the front catalytic converter in turbocharged engines, and removal is like removing a spark plug, through the use of an open-end wrench to prevent touching the electrical lead. First disconnect the negative battery cable, and then unscrew the electrical connector of the sensor. Loosen and unscrew the oxygen sensor, removing the crush ring gasket, where it exists, with the proper size wrench. Carefully touch the sensor so as not to drop it or mishandle it, and keep the electrical connector and the louvered end of the sensor clean and free of grease and dirt. Wipe the threads of the sensor and cleaning the place of its location before installation. When necessary, it would be prudent to thread the crush ring gasket onto the sensor before applying a coating of an anti-seize compound to the threads, but not to touch the sensor. Install the sensor and gasket screwed and torced to specification, reconnect the electrical connector, and made the final connection of the negative battery connector.