Expedition 4WD V8-5.4L VIN 5 (2006)
Ride Height Sensor: Customer Interest
Suspension - Air Suspension Height Sensor Linkage Loose
TSB 06-15-10
08/07/06
AIR SUSPENSION PERFORMANCE - HEIGHT SENSOR
LINKAGE ARM DISENGAGING
FORD:
2003-2006 Expedition
LINCOLN:
2003-2006 Navigator
ISSUE
Some 2003-2006 Expedition and Navigator vehicles equipped with an air suspension may exhibit an air suspension height sensor linkage arm
disengaging from the suspension ball stud or height sensor rotating arm. This concern typically occurs with the rear sensor (Figure 1) but may occur with
the front sensors as well. If this occurs, the symptom will typically be the vehicle leaning to one side, the vehicle sitting too low/high, a harsh ride, and/or
an inoperative air suspension. In addition, this concern may result in diagnostic trouble code (DTC) C1725 (air suspension front pneumatic failure) or
C1726 (air suspension rear pneumatic failure).
ACTION
When a linkage arm becomes disengaged, do not re-attach the arm and do not replace the sensor unless broken. Instead, install a revised linkage arm on
all three (3) sensor assemblies, even if they have not detached from the ball stud. Refer to the following Service Procedure.
SERVICE PROCEDURE
