The car Bluetooth can't hear WeChat voice, probably because Bluetooth's "Call Audio" is not turned on. Each car is equipped with a different Bluetooth system. After some cars are connected with Bluetooth, Bluetooth will set two buttons, namely "Call Audio" and "Media Audio". At this point, both audio can be turned on. The specific steps are as follows. 1. Enter the Bluetooth interface from the mobile phone and click the paired Bluetooth; 2. After entering the settings, turn on the call audio and media audio buttons; 3. In addition, some models have only one audio channel, that is, only one of call audio and media audio can be turned on. If there is no sound in WeChat voice, just turn on the call audio button at this time.

In addition, some models will also set "Mobile Audio" and "Media Audio" buttons on Bluetooth. The audio button of the mobile phone is used for the voice of the mobile phone, that is to say, when this button is turned on, all the media audio except the call is emitted by the mobile phone when connected with Bluetooth.