Replacing the Oxygen Concentration Diagnostic Sensor (Kalina 1118)

In a car, the diagnostic oxygen concentration sensor is installed in the catalytic converter behind the neutralizer, operates on the same principle as the control oxygen concentration sensor, and is completely interchangeable with it. The signal generated by the diagnostic oxygen concentration sensor indicates the presence of oxygen in the exhaust gases after the catalytic converter. If the converter is operating normally, the readings from the diagnostic oxygen sensor will differ significantly from the readings from the control oxygen sensor.

To replace the diagnostic oxygen concentration sensor on your vehicle, you will need a 22 mm wrench.

1. Disconnect the wire from the negative terminal of the battery.

2. Disconnect the oxygen sensor wiring harness connector from the vehicle wiring.



3. Disconnect the oxygen sensor wire harness retainer from the heat shield.

4. Unscrew the three nuts securing the additional muffler to the catalytic converter and remove the heat shield of the muffler inlet pipe (see "Replacing the additional muffler").



5. Unscrew the oxygen concentration diagnostic sensor and remove it from the vehicle.

6. Install the oxygen concentration diagnostic sensor on the vehicle in the reverse order of removal.