Jeep Grand Cherokee 2021–2023 — technical service bulletin
Bulletin S2203000005 · NHTSA communication 10229749 · issued Dec 9, 2022
Technical service bulletin
communication type
Electrical System
component
2021–2023
model years
3
vehicle entries
Official summary
Service Four Wheel Drive (4wd) Message Illuminated. Diagnostic Trouble Code (DTC) C1403-29 ? Transfer Case Range Position Sensor Signal Invalid, Set.
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.