When replacing the oxygen sensor, you should first ensure personal safety to avoid burns. Operation should be carried out after the engine is cooled, gently feel the thread of the oxygen sensor loose, and forcibly unscrew it at one time. If you need to replace the oxygen sensor, choose the pre - or post-oxygen replacement according to the damage. Unless both oxygen sensors are damaged at the same time, you do not need to replace the two oxygen sensors at the same time. Considering that the replacement of the oxygen sensor requires professional tools and knowledge, as well as troubleshooting the cause of the failure, it is recommended that the owner do not replace it by himself, but go to a professional maintenance point for repair
When installing automotive oxygen sensors, the following points need to be noted:
1. Distinguish the position: the oxygen sensor is installed in front of the three-way catalytic converter, and the post-oxygen sensor is installed behind the three-way catalytic converter.
2. Tool preparation: Use professional tools to install the oxygen sensor, especially considering that the thread size of the oxygen sensor is generally M18, and the recommended torque is 45-55Nm.
3. High temperature protection: The working temperature of the oxygen sensor can reach 800 ° C. Therefore, pay attention to preventing burns when removing or installing the oxygen sensor and ensure that the exhaust pipe is completely cooled before operating it.
