Jeep Wrangler 2018–2021 — technical service bulletin

Bulletin S2008000156 · NHTSA communication 10183033 · issued Oct 16, 2020

Technical service bulletin

communication type

Engine

component

2018–2021

model years

vehicle entries

Official summary

CEL (Check Engine Lamp) On, Intermittent Hard Starting, Rough Idle

Vehicles covered

2018 Jeep Wrangler
2019 Jeep Wrangler
2020 Jeep Wrangler
2021 Jeep Wrangler

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.