November 20, 2021 Service bulletin

Air Suspension Slow to Change Height This bulletin involves inspecting the vehicle for pinched front air...

Jeep technical service bulletin 02-007-21 for 2021 Jeep Grand Cherokee.

Bulletin number: 02-007-21
Component: Electrical system
Summary: 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.

Owners of these vehicles have filed 115 complaints in the electrical category.

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