Action
The oxygen sensor is installed on the exhaust manifold. It is used to determine the concentration of 02 in the exhaust gas. If the ratio in the fuel mixture is not ideal, for example, it is poorer (those. too much air), the exhaust gas contains a large amount of oxygen. If it is richer than ideal, then there is almost no oxygen left in the exhaust gas. The oxygen sensor converts the information about the O2 content in the exhaust gas into a weak electrical signal that is fed to the computer and used to calculate the effective electrical feedback pulses. By acting on various components of the engine system, the on-board computer can change the ratio in the air-fuel mixture, bringing it to the ideal composition: 14.7 parts of air to 1 part of fuel. When the ratio is ideal, its efficiency is highest and exhaust is minimal.
Removal and installation
The sensors can be unscrewed from the manifold or exhaust pipe. Make sure the exhaust system is cold to avoid serious burns during installation. Remove the electrical contact next to the sensor. Use the special cartridge to remove and install the sensor. These cartridges have a special groove in the wall so as not to damage the wiring. They should also be well matched to the sensor size. Hold the wrench straight to avoid bending the sensor or stripping the threads. To install the sensor, the threads are coated with an anti-jamming compound. Be very careful not to get any compound or oil on the tip of the sensor, otherwise its performance will be distorted by contamination. Install the sensor and tighten it with a torque of 45 Nm. Connect the wires to the sensor.