Hello I have a 2004 freestar that I dont drive much but the other day I did and found the airbag light flashing code 91 anyone know what it means? Also headed to the parts store and try the handheld reader for fault codes. Any info would be great.

 

Restraint System — Side Air Bag Fault (Driver Seat Side Air Bag Short to Ground Fault)

That is the print out for your flashing code. There is a 12 major step process to find it. Not really a quick fix. But look for a short to ground on the wiring.