This article supersedes TSB 06-20-13 to update the model year coverage and Service Procedure.
Some 2003 Expeditions built 4/1/2002-1/31/2003, 2003-2005 Town Car and 2003-2006 Lincoln LS, and Navigator vehicles may exhibit an inoperative parking aid system and diagnostic trouble code (DTC) C1983 stored in memory of the Parking Aid Module (PAM).
Follow the Service Procedure steps to verify the vehicle has DTC C1983 in memory. If DTC C1983 is the only DTC present, it may be necessary to replace the PAM.
Refer to the following for the correct WSM section: