Code 13 - Air Bag Module Or Front Impact Sensor Shorted To Ground: Description
WARNING: This page is about a different car, the 1996 Ford Probe. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic monitor measures voltage at terminal No. 11 at diagnostic monitor connector. See Figure . Voltage varies with charging system voltage. If diagnostic monitor measures a voltage of 2 volts or less at terminal No. 11, Code 13 will set. When Code 13 sets, diagnostic monitor blows its internal thermal fuse. This disables air bag deployment circuit. If short to ground is corrected, voltage at terminal No. 11 will return to normal and a fault CODE 51 will set, indicating an open thermal fuse.