Possible Causes
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.
Code 46 will set if there is a poor connection due to loose mounting, dirt or corrosion at left impact sensor mounting surface. Code 46 will also set if there is an open or damaged wire between terminal No. 22 of diagnostic monitor connector and left front impact sensor. An open or loose wire inside of impact sensor will also cause Code 46 to set.