Jeep Grand Wagoneer 2024 — technical service bulletin
Bulletin 08-158-25 · NHTSA communication 11018474 · issued May 16, 2025
Technical service bulletin
communication type
Suspension
component
2024
model years
2
vehicle entries
Official summary
"Flash: Air Suspension Control Module (ASCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● U0300-00 - Internal Control Module Software Incompatibility. Customers may also experience:** ● After towing a heavy load above the protection limit, the air suspension will only lower and will remain in low ride height. Instrument Panel Message (IPC) message ""selected ride height not permitted due to payload"" appears. This bulletin involves reprogramming the ASCM with the latest availa
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.