Jeep Wrangler 2018–2020 — technical service bulletin
Bulletin S2108000146 · NHTSA communication 10221281 · issued Jun 16, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2020
model years
3
vehicle entries
Official summary
Check Engine Lamp Comes On, CAN C Loss Communication DTC?s Setting Stored Or Active Intermittently
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.