Jeep Wrangler 2020–2021 — technical service bulletin
Bulletin S2108000074 · NHTSA communication 10220905 · issued Mar 24, 2021
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
2
vehicle entries
Official summary
Wiring Harness Contacts Drivers Catalytic Converter. Check Engine Light (CEL), Anti-Lock Brake System (ABS), Traction Control System (TCS), Service 4WD Lamp On
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.