I spent allot of time in the dealer world, so here are some thoughts. You should document everything that you did including the codes that you got and give it to your customer. She should call customer support and explain that she is still having steering problems and let them know she was never at the dealer that replaced the sensor under recall. Tell her to be very nice no matter how she feels, this will go a long way with the Ford rep. Also she could say she feels very unsafe driving the car because of lost steering. Good luck, hope it goes well for her and you.