How to put freon in 2003 honda civic?

To add Freon to a 2003 Honda Civic, first ensure you have the correct type of refrigerant (R-134a) and a recharge kit with a pressure gauge. Locate the low-pressure service port, typically found on the larger AC line, and connect the recharge hose. Start the engine and turn on the AC to the maximum setting, then slowly add refrigerant while monitoring the gauge to avoid overcharging. Always follow safety precautions and consult the vehicle's manual for specific instructions.