Jeep Wrangler 2021 — technical service bulletin
Bulletin 18-022-24 REV. A · NHTSA communication 11001250 · issued May 16, 2024
Technical service bulletin
communication type
Power Train
component
2021
model years
1
vehicle entries
Official summary
"Flash: Powertrain Control Module (PCM) Enhancements **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):** ● U0402-00 - Implausible Data Received From TCM. ● U145D - Implausible Data Received From TCM On D-PT. Customers may experience one or more of the following: ● Noticeable oil life degradation when fuel and oil refresh mode active. ● Vehicle may not be able to enter electric mode driving while Fuel Oil Refresh Mode (FORM) is active. ● FORM staying on too long. Other softwa
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.