Jeep Grand Cherokee 2021 — technical service bulletin
Bulletin S2123000070 REV.A · NHTSA communication 11032992 · issued May 18, 2026
Technical service bulletin
communication type
Electrical System
component
2021
model years
3
vehicle entries
Official summary
After Electric Power Steering (EPS) Replacement, Diagnostic Trouble Code (DTC) C221C-00 ECU Not Programmed/Flash Required Is 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.