Jeep Gladiator 2020–2021 — technical service bulletin
Bulletin S2118000004 · NHTSA communication 10221173 · issued Apr 29, 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 Codes (DTCs) P225D ? NOX Sensor 1/1 Performance, Signal Stuck Low And/Or P225C ? NOX Sensor 1/1 Performance, Signal Stuck High, 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.