What are the reasons for the Civic's Bluetooth connection failure?

[DeCorey]

Incompatibility between the phone's Bluetooth and the car's Bluetooth is the cause of the Civic's Bluetooth connection failure. Mismatched pairing codes: If the sound is turned on, it may be due to a mismatch between the music playback programming and the car's pairing codes. In this case, calls can be answered, but music cannot be played. It is recommended to change the car's Bluetooth playback audio settings. After changing, the music playback function should work normally. Music option not enabled: If music is playing on the phone but there is no sound in the car, it is likely because the music option on the car's system is not turned on. Once enabled, the music will play.