Jeep Wrangler 2020–2021 — technical service bulletin
Bulletin 9004311 · NHTSA communication 10223889 · issued Oct 21, 2020
Technical service bulletin
communication type
Wheels
component
2020–2021
model years
2
vehicle entries
Official summary
SENSOR, Wheel Speed Please call FCA Redacted Content prior to replacing a rear wheel speed sensor for one of the following fault codes: C003A-1D and or 2F (right rear wss circuit current out of range or signal erratic) C0037-1D and or 2F (left rear wss circuit current out of range or signal erratic) If no response in 15 minutes, proceed with repair.
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.