Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp...
Jeep technical service bulletin 18-076-25 for 2023 Jeep Wagoneer and 2023 Jeep Grand Wagoneer.
- Bulletin number
- 18-076-25
- Component
- Unknown or other
- 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 Sensor "A" Circuit Range/Performance. ● P2C90-00 - Crankcase Ventilation System - Hose "A" Disconnected. ● P0604-00 - Internal Control Module Random Access Memory Ram Error. ● P060C-00 - Internal Control Module Main Processor Performance. Customer may also experience one or more of the following: ● Undesirable vehicle drivability behavior causing a Shift to Park event during Engine Stop Start (ESS) while Adaptive Cruise Control (ACC) is active. ● Pressing the ACC button while ESS is active can shift the vehicle to park. ● Idle speed oscillations observed when in "Snow" and "Mud" modes. ● Poor engine performance (undershoots engine speed) for ESS and for non-ESS engine start. ● Screen two incorrectly pops up on the Instrument Cluster Panel (IPC) for five seconds during "Terrain" and "Rock" mode. ● Poor or reduced Air Conditioning (A/C) performance during wide open throttle or heavy acceleration. In addition, the following software enhancement is available: ● Software update to prevent false DTC detection of U0104-00, U0405-00 and P018B. (NA Market Only) This bulletin involves reprogramming the PCM with the latest available software.
Vehicles covered
- Jeep Wagoneer 2023 2023
- Jeep Grand Wagoneer 2023 2023
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