Jeep Gladiator 2021 — technical service bulletin
Bulletin S2208000121 · NHTSA communication 10221409 · issued Jun 4, 2022
Technical service bulletin
communication type
Back Over Prevention
component
2021
model years
1
vehicle entries
Official summary
Check Engine Lamp (CEL) On, DEF Reductant Quality Sensor Circuit
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.