{"nhtsa_id":10204407,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-13","date":"2021-11-20","document_id":"02-007-21","mfr_campaign":null,"replaces":null,"component":"SUSPENSION; ELECTRICAL SYSTEM","mfr_system":null,"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204407-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204407-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10204407","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"suspension","name":"Suspension","parent":null}],"codes":["C1556","C1567","C1569","C15A0","C15A1","C15A2","C15AD","C220C"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_jeep_grand-cherokee"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}