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Why can't the car USB recognize the phone?

2 Answers

JaxonRose

07/29/25 9:19pm

Car USB only charges but does not recognize the phone because the power of the car USB port and the phone port is insufficient. USB car charger: Usually referred to as USB car charger for short. It takes advantage of the universality of USB, which is widely used in various charging interfaces. Combined with its application in cars, it converts the 12V-DC and 24V-DC in the car into the common DC-5V voltage for USB and other charging devices. Common specifications of USB car chargers: Output: 5V-DC-500mA; 5V-DC-700mA; 5V-DC-1000mA; 5V-DC-2000mA.

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StCassandra

08/15/25 7:53pm

I've personally experienced this situation several times. At first, I thought my phone was broken, but later discovered it was due to dust accumulation in the car's USB port or aging data cables causing poor contact. Usually, switching to a high-quality data cable solves the problem. Also, after a phone system update, if the car's software is too old, compatibility issues may cause recognition failures. It's quite frustrating when the USB doesn't work while driving—unable to charge the phone with low battery, affecting navigation and music playback. I recommend regularly cleaning the USB port to prevent dust buildup and using certified cables to reduce the chance of failure. Additionally, in older vehicles, the USB port may become loose or have internal circuit issues. It's best to have it checked at a repair shop promptly to prevent minor issues from becoming major problems, ensuring safe driving.

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