Reprogram Ram Air Suspension
This bulletin applies to 2015-2016 RAM 1500 trucks equipped with four-corner air suspension and built on or after December 4, 2014, and on or before February 22, 2016.
Customers may experience no ride height change under very cold conditions, in addition to the warning light on. The following diagnostic trouble codes (DTCs) may have set:
C15A1-00 (unable to obtain desired ride height)
C1562-98 (ride height air pump control...component pr system over temperature)
C1562-92 (height air pump control performance or incorrect operation)
C159F-92 (air suspension reverse valve 1 control...performance or incorrect operation)
C15A0-92 (air suspension reverse valve 2 control....performance or incorrect operation)
C155E-92 (height pressure vent control...performance or incorrect operation)
C15AA-00 (air leak during event)
Using a scan tool first verify that all systems are working as designed and repair as needed. Then reprogram the ASCM (air suspension control module) with the latest software.