Heat oil in a wok. Cook chicken until done.
Add peppers, onion and sprinkle fajita mix into the wok. Cook for 5 minutes and take off the heat.
Heat tortillas in the microwave for 20 seconds. Place ingredients out for everyone to help themselves. On a tortilla place wok mixture, cheese and sour cream. Fold bottom of tortilla up over mixture and fold the sides of the tortilla in. Pick up and enjoy!