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What are the reasons for no sound when a phone is connected to car Bluetooth?

2 Answers

McAsher

07/28/25 10:18pm

There are several possible reasons why there is no sound when a phone is connected to car Bluetooth: the call volume on the phone is not turned on, the volume of the car navigation system is not enabled, or the car Bluetooth and the phone are not properly paired. If the call volume on the phone is not turned on, the solution is: try dialing a phone number, and during the dialing or call state, press the volume up button on the side of the phone to increase the sound. If the volume of the car navigation system is not enabled, go to the phone's "Settings" — "Sound," find the "Media" option, and increase the "Media" volume. If the car Bluetooth and the phone are not properly paired, the solution is: first, establish a pairing relationship between the phone and the car Bluetooth device. Enable the Bluetooth function on both the phone and the car Bluetooth device, and set the phone's Bluetooth to "Visible to All." Then, search for Bluetooth devices on the phone, select the car Bluetooth device once found, and pair using the password: 0000. After successful pairing, the connection will be established. Once the car Bluetooth and phone are successfully paired, you can make and receive calls; playing music on the phone can be enjoyed through the car Bluetooth device.

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LaArabella

08/12/25 2:50am

I used to frequently encounter the issue of my phone connecting to Bluetooth but having no sound while driving, which was quite frustrating. The most common reason is incorrect phone settings—often the phone shows Bluetooth is connected, but the audio output isn't switched to Bluetooth. In this case, open the sound settings on your phone and make sure it’s directed to the car’s audio device. The car’s system also needs to be checked—for example, switch the input source to Bluetooth via the steering wheel or control screen, ensuring it’s not stuck on FM or CD mode. If the pairing is unstable, the signal between the phone and car device may not sync properly, so it’s best to unpair and reconnect them. Additionally, poor system compatibility often causes issues—like when I used an older iPhone with a newer car model, requiring both devices to be updated to the latest software. Regularly restarting your phone and car system can help avoid minor glitches. If the problem persists, the Bluetooth module hardware might be faulty, in which case it’s best to visit a repair shop rather than attempting DIY fixes.

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