Technical Service Bulletin 18-023-25 REV. A — 2025 JEEP WAGONEER

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): ● **U0673-00 - Lost Communication With Ion Sense Module (in active or stored status). ● P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking (in active or stored status). ● P2C90-00 - Crankcase Ventilation System - Hose "A" Disconnected (in active or stored status). ● P0116-00 - Engine Coolant Temperature Sensor 1 Performance (in active or stored status). ● P0011-00 - Bank 1 Camshaft 1 Position Timing Over Advanced Or (in active or stored status). ● P25E4-00 - B Camshaft Position - Unable To Achieve Locked Position Bank 1 (in active or stored status). ● P06DD-00 - Engine Oil Pressure Control Circuit Performance/stuck Off (in active or stored status).** ● P1CEA - Boost Side EVAP Purge System Performance **(in active or stored status).** ● P2AF6 - Dual Starter Relay Stuck **(in active or stored status).** ● P026E - Charge Air Cooler Coolant Pump Performance **(in active or stored status).** Customers may also comment on one or more of the following: ● **Oil Level High Warning in the Instrument Panel Cluster (IPC). ● Engine will not start.** ● Low battery State of Charge (SoC) leading to battery replacement. ● Vehicle does not restart after an Engine Stop Start (ESS) event but will restart after an ignition cycle. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.