Lambda probe
1 - heat shield; 2 - connector; 3 - sealing ring
The lambda probe or oxygen sensor measures the amount of oxygen in the exhaust gases and transmits information to the electronic unit, which changes the composition of the fuel-air mixture to ensure combustion of the exhaust gases in the catalyst.
Removal and installation
1. Disconnect the ground wire from the battery and raise the rear of the vehicle.
2. Remove the multi-pin connector and heat shield from the lambda probe.
3. Unscrew the lambda probe from the muffler and remove it together with the gasket.
4. Install the lambda probe in the reverse order of removal.
Examination
Checking the lambda probe is carried out on a warm engine.
1. Connect an LED probe and a voltmeter to the diagnostic socket located on the left side of the engine compartment in the wiring harness above the pillar.
2. With a normally working lambda probe, the voltage should be 4.5 volts. At a different voltage value, it is necessary to adjust the CO content.
3. In the absence of voltage, the performance of the lambda probe is impaired.
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