Jeep Gladiator 2020–2021 — technical service bulletin
Bulletin S2118000006 · NHTSA communication 10223404 · issued May 3, 2021
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
5
vehicle entries
Official summary
Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P20C6 ? Reductant Heater 4 Control Circuit, Set.
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.