Jeep Grand Wagoneer 2023 — technical service bulletin
Bulletin 18-077-25 · NHTSA communication 11021837 · issued Aug 5, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2023
model years
2
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):** ● **U0104-00 - Lost Communication With Cruise Control Module. (NA Market Only) ● U0405-00 - Invalid Data Received From Cruise Control Module. (NA Market Only)** ● P018B - Fuel Pressure Sensor "B" Circuit Range/Performance. ● P00C6 - Fuel Rail Pressure Too Low - Engine Cranking Bank 1. ● P06DD - Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0461 - Fuel Level Sens
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.