Jeep Gladiator 2021 — technical service bulletin
Bulletin 18-006-26 · NHTSA communication 11028233 · issued Jan 29, 2026
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P08A6 – Gear Lever Position Sensor System – Multiple Sensor Correlation (Manual Transmission Only). ● P152F – Engine Hood Switch 2 / Engine Hood Switch 1 Correlation.** ● P0300 - Multiple Cylinder Misfire. ● P152E - Engine Hood Switch 2 Circuit High. ● P0032 - O2 Sensor 1/1 Heater Circuit High. ● P0038 - O2 Sensor 1/2 Heater Circuit High ● P0052 - O2 Sensor 2/1 Heater Circuit H
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.