How can the sensor ask the address if it doesn't know the address?

If you don't know the address of the 458 sensor, you can try the following methods to find it:

1. Use the OBD diagnostic tool: connect the OBD diagnostic tool to the OBD interface of the vehicle, and use the scanning function on the tool to scan and identify the addresses of various sensors on the vehicle.

2. Use tools provided by vehicle manufacturers: Some automobile manufacturers provide specific software or tools that can help users find the address of specific sensors. You can consult the vehicle manufacturer or consult the relevant manual for more information.

3. Consult a professional technician: If you encounter an address problem in the process of repairing or maintaining a car, you'd better consult a professional technician. They have rich experience and knowledge and can help you find the address of the sensor.

Please note that different vehicles and sensors may find different addresses, so you'd better refer to relevant technical documents or consult professionals for correct steps and guidance.