A/C only works on drivers side

The A/C in my 2013 Tacoma only works on the drivers side. It’s cold on the far left but on the right side it blows out warm. Any idea why this is happening and how I can fix it??

 

Low charge, very common. May be a slow leak, I would take it to an A/C shop.

 

As Bishop84 said. This is a classic symptoms of a low refrigerant charge ( r134a ). You have a leak somewhere that needs to be repaired...

 

Ayup, what they said.

Lowe's sells Craftsman UV flashlights. Get one, and start looking around. In a darker area will help.
You can pull that seal off where the lines go into the cab. There's a connection behind it look in there too.

 

Leaks attract dirt and leave oily residue. You can fix yourself but it requires proper tools.