If your vehicle is showing 12v accessory outlet or usb ports not charging, here are the most likely causes and the parts you'll need to fix each one.
The most common reason for a dead 12V outlet or USB port is a blown fuse. This is typically caused by a faulty aftermarket phone charger, overloading the circuit, or a coin falling into the socket and shorting it out.
Dirt, pocket lint, spilled liquids, or foreign objects can block the electrical contacts inside the socket, preventing your charger from making a solid connection.
If the radio, dashboard, or center console was recently removed for repairs or upgrades, the wiring connector for the 12V outlet or USB port may have been accidentally left unplugged.
The relay that switches power to the accessory outlets when the ignition is turned on can wear out and fail, cutting power to all interior sockets simultaneously.
In modern vehicles, USB ports and accessory power management are often controlled by the Body Control Module. A failure or software glitch here can disable interior electronics.