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Service bulletins for the 2022 Jeep Wagoneer

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

619 on file from NHTSA, as of 2026-10-19.

About P0604 on the 2022 Jeep Wagoneer: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

Only bulletins with trouble code: P0604 are shown. Show all

Bulletins, newest first
18-068-262026-07-23. Service bulletin. POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **U0405-00 - Invalid Data Received From Cruise Control Module. ● U0104-00 - Lost Communication With Cruise Control Module. NOTE: Vehicles setting DTCs U0405-00 and U0104-00 may experience an inability to be cleared.** ● P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking. ● P06DD-00 - Engine Oil Pressure Control Circuit Stuck Off. ● P0604-00 - Internal Control Module Random Access Memory Ram Error. ● P060C-00 - Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
18-040-262026-03-25. Service bulletin. ENGINE. Flash: Powertrain Control Module (PCM) Updates Customers **must** experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle **must** SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1 (In Active or Stored status). ● P0071-00 - Ambient Air Temperature Sensor Performance (In Active or Stored status). ● P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low (In Active or Stored status). ● P0073-00 - Ambient Air Temperature Sensor Circuit "A" High (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). ● P05BD-00 - Stop-Start Mode Switch Range/Performance (In Active or Stored status). ● P0116-00 - Engine Coolant Temperature Sensor 1 Performance (In Active or Stored status). ● P062B-00 - Internal Control Module Fuel Injector Control Performance (In Active or Stored status). ● P018B-00 - Fuel Pressure Sensor "B" Circuit Range/Performance (In Active or Stored status). ● P0604-00 - Internal Control Module Random Access Memory RAM Error (In Active or Stored status). ● P060C-00 - Internal Control Module Main Processor Performance (In Active or Stored status). ● U0104-00 - Lost Communication With Cruise Control Module **(In Active or Stored status)**. **Customers may also comment on the following:** ● **Oil Level High Warning in the Instrument Panel Cluster (IPC).** This bulletin involves reprogramming the PCM with the latest available software.
18-044-262026-03-25. Service bulletin. ENGINE. Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) ● P0071-00 - Ambient Air Temperature Sensor Performance. (In Active or Stored status) ● P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low. (In Active or Stored status) ● P0073-00 - Ambient Air Temperature Sensor Circuit "A" High. (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) ● P05BD-00 - Stop-Start Mode Switch Range/Performance. (In Active or Stored status) ● P0116-00 - Engine Coolant Temperature Sensor 1 Performance. (In Active or Stored status) ● P062B-00 - Internal Control Module Fuel Injector Control Performance. (In Active or Stored status) ● P0604-00 - Internal Control Module Random Access Memory Ram Error. (In Active or Stored status) ● P060C-00 - Internal Control Module Main Processor Performance. (In Active or Stored status)** ● P018B-00 - Fuel Pressure Sensor "B" Circuit Range/performance. **(In Active or Stored status)** ● P1CEA-00 - Boost Side EVAP Purge System Performance. **(In Active or Stored status)** ● P06DD-00 - Engine Oil Pressure Control Circuit Performance/Stuck Off. **(In Active or Stored status)** ● P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking. **(In Active or Stored status)** ● P0300-00 - Multiple Cylinder Misfire. **(In Active or Stored status)** Customers may also experience one or more of the following: ● **Oil Level High Warning in the Instrument Panel Cluster (IPC).** ● Fully Autonomous Parking Assist (FAPA) is not deactivated when accelerator pedal is pressed. ● Vehicle is not heating up fast enough at freezi
18-040-262026-03-25. Service bulletin. ENGINE. Flash: Powertrain Control Module (PCM) Updates Customers **must** experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle **must** SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1 (In Active or Stored status). ● P0071-00 - Ambient Air Temperature Sensor Performance (In Active or Stored status). ● P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low (In Active or Stored status). ● P0073-00 - Ambient Air Temperature Sensor Circuit "A" High (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). ● P05BD-00 - Stop-Start Mode Switch Range/Performance (In Active or Stored status). ● P0116-00 - Engine Coolant Temperature Sensor 1 Performance (In Active or Stored status). ● P062B-00 - Internal Control Module Fuel Injector Control Performance (In Active or Stored status). ● P018B-00 - Fuel Pressure Sensor "B" Circuit Range/Performance (In Active or Stored status). ● P0604-00 - Internal Control Module Random Access Memory RAM Error (In Active or Stored status). ● P060C-00 - Internal Control Module Main Processor Performance (In Active or Stored status). ● U0104-00 - Lost Communication With Cruise Control Module **(In Active or Stored status)**. **Customers may also comment on the following:** ● **Oil Level High Warning in the Instrument Panel Cluster (IPC).** This bulletin involves reprogramming the PCM with the latest available software.
18-024-252025-05-06. Service bulletin. POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **U0104 - Lost Communication with Cruise Control Module.** ● P00C6 - Fuel Rail Pressure Too Low - Engine Cranking Bank 1. ● P06DD - Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0604-00 - Internal Control Module Random Access Memory Ram Error. ● P060C-00 - Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software. "
18002242024-03-18. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; SERVICE BRAKES. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? **P00C6 - Fuel Rail Pressure Too Low - Engine Cranking Bank 1. ? P06DD - Engine Oil Pressure Control Circuit Performance/Stuck Off.** ? P0604-00 - Internal Control Module Random Access Memory Ram Error. ? P060C-00 - Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
18058232024-01-16. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? P0604-00 - Internal Control Module Random Access Memory Ram Error. ? P060C-00 - Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
18058232023-12-18. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one of the following Diagnostic Trouble Codes (DTCs) have been set: ? **P0604-00 - Internal Control Module Random Access Memory Ram Error.** ? P060C-00 - Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.