Jeep Wrangler 2018–2021 — technical service bulletin
Bulletin S2008000156 · NHTSA communication 10223922 · issued Oct 16, 2020
Technical service bulletin
communication type
Electrical System
component
2018–2021
model years
4
vehicle entries
Official summary
CEL (Check Engine Lamp) On, Intermittent Hard Starting, Rough Idle
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.