Jeep Wagoneer 2022 — technical service bulletin
Bulletin 0801422 · NHTSA communication 10222987 · issued Jan 15, 2022
Technical service bulletin
communication type
Exterior Lighting
component
2022
model years
1
vehicle entries
Official summary
Flash: Drivetrain Control Module (DTCM) Updates This bulletin involves reprogramming the DTCM with the latest available software. The customer may describe one or more of the following: ?Service 4WD warning? displayed in the Instrument Panel Cluster (IPC). A binding or heavy steering feel when making sharp turns at low speeds. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DiagnosticTrouble Codes (DTCs) have been set:C1423-64 -Transfer Case Internal Performance-Signal Plausibility Fa
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.