Replacing the oxygen concentration control sensor (Kalina 1118)

In the vehicle, the control oxygen concentration sensor is used in the closed-loop fuel injection system and is installed at the top of the catalytic converter. To adjust the calculations of the injection pulse duration, information about the presence of oxygen in the exhaust gases is used; this information is provided by the control oxygen concentration sensor. The oxygen contained in the exhaust gases reacts with the oxygen sensor, creating a potential difference at the sensor output. It varies from approximately 0.1 V (high oxygen content - lean mixture) up to 0.9 V (low oxygen - rich mixture).

For normal operation, the temperature of the oxygen concentration sensor must be at least 300°C. Therefore, a heating element is built into the oxygen concentration sensor for rapid warming up after starting the engine.

By monitoring the output voltage of the oxygen concentration sensor, the controller determines which command to send to the injectors to adjust the composition of the working mixture. If the mixture is lean (low potential difference at the output of the oxygen concentration sensor), then the controller gives a command to enrich the mixture; if the mixture is rich (high potential difference) - to lean the mixture.

To replace the oxygen concentration control 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 concentration sensor connector and the wiring harness by pressing the plastic latch.





3. Disconnect the wiring harness connector retainer from the heat shield.



4. Unscrew the oxygen concentration sensor from the catalytic converter and remove the oxygen concentration sensor.

5. Install the oxygen concentration control sensor on the vehicle in the reverse order of removal.