USB PORT not working

I'm sure someone posted about this, but my iPhone is no longer recognized nor does it charge in the USB port, I used several different chargers and I think at least one of them was an Apple charger. Any ideas?

 

Restart it. I can't attest to the stereo in your truck not recognizing your iPhone, because I haven't had a stock sound system in my truck in almost five years.

That, and I have an iPod Nano for playing music in the truck and rarely ever use the iPhone for music...

However, my iPhone has periodically refused to charge and restarting it has always done the trick for me.

 

I'm still new so bear with me. Is that port (usb and aux) just to be able to access your phone? I just wanted to charge the other day and it wouldn't. Seems easier than plugging the plug into the 12v jack. Also, I see there is a warning displayed when your tire pressure is low, but I can't find a monitor to see what your pressure it. Am I missing this?

Thanks