Air Suspension Slow to Change Height
This bulletin involves inspecting the vehicle for pinched front air suspension lines.
The customer may notice a ?Service Air Suspension? message in the cluster. Upon further investigation a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) set:C1556-16 - Height Sensors Implausible - Out Of Plane C1567-85 - Left Front Ride Height Level Performance-Signal Above Allowable Range C1569-85 - Right Front Ride Height Level Performance-Signal Above Allowable Range C15A2-00 - Ride Height System Unlevel. C15A1-00 - Unable to Obtain Desired Ride Height. C15A0-01 - There is an internal fault in control unit "Suspension". The temperature is above threshold. C15AD-92 - Ride Height System- Perfor- Mance Or Incorrect Operation. C220C-98 - Active Suspension Module Internal- Component Or System Over Temperature. Customers may also experience one or more of the following: Slow changes in ride heights. Ride height changes denied due Air Suspension Control Module (ASCM) timing out. Uneven front suspension. Air suspension inoperable.
