Service bulletin 0804623

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10234489
Published by NHTSA	2023-04-17
Manufacturer's number	0804623
Manufacturer's date	2023-02-10
NHTSA component	PARKING BRAKE; VEHICLE SPEED CONTROL; BACK OVER PREVENTION; ELECTRICAL SYSTEM; SEATS; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY

NHTSA's summary

Radio Over The Air S26.18 Updating to T25L Software Version Customers may experience one or more of the following: ? Amplifier module sets DTC U0485 - Implausible Data Received Set. ? Radio reset (Rearview camera functions normally). ? Voice Recognition (VR) inoperable. ? Wireless CarPlayT inoperable. ? Audio sources inoperable. ? Display switches to Nav on VR prompt. ? Vehicle Positioning (Lat/Long) inoperable. ? Surround View Camera inoperable (Rearview camera functions normally). ? Unable to exit FamCam. ? Audio Repetition inoperable. ? Electric vehicle pages inoperable. ? Translated text is incorrect. ? Profile avatar changes in Valet Mode. ? Display does not return to idle mode after call. ? Dynamic rear view camera guidelines inoperable. ? FOTA popup won?t dismiss. ? Ambient Lights Setting inoperable. ? Call Status on after all ended Favorites available in valet mode. ? SXMT Favorites inoperable. ? Tutorial App inoperable. ? Audio Repetition stops during incoming calls. ? Unable to connect second device. ? Unable to exit Seat Comfort popup. ? Call does not end on the Instrument Panel Cluster (IPC). ? Seat Comfort graphic incorrect. ? Headphone button for front passenger display inoperable. ? Schedule update inoperable. ? USB media source inoperable on front passenger display. ? SXMT inoperable. ? Wireless Android Auto inoperable. ? Media sources duplicated. ? Audio unmuted at door close. ? Radio freeze (Rearview camera functions normally). ? Radio input lagging. ? Navigation active with no active route. ? Scheduled cabin cooling inoperable. ? Incorrect phone repetition displayed. ? Navigation routing inoperable. ? Unable to exit electric vehicle Pages. ? Comfort softkeys incorrect. ? Comfort graphic overlap. ? Unable to change audio sources. ? Audio sources unavailable after profile switch. ? No incoming call popup on Uconnect phone. ? FamCam image in black and white.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Driver assistance, Electrical system, Fuel system, Seats, Throttle and cruise control, Backup camera, Fuel tank, Parking brake

Trouble codes named

U0485

Vehicles listed
JEEP GRAND CHEROKEE	2023
JEEP GRAND WAGONEER	2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
24V436000	2024-06-13. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
24V291000	2024-04-25. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
24V289000	2024-04-25. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
23V577000	2023-08-14. BACK OVER PREVENTION:DISPLAY FUNCTION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S2508000029 REV.B	2026-08-19. Service bulletin. Instrument Panel Cluster (IPC) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes (DTCs)
S2508000029 REV.A	2026-08-13. Service bulletin. Instrument Panel Cluster (IPC) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes (DTCs)
S2508000029	2025-04-22. Service bulletin. Instrument Panel Cluster (IPC) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes (DTCs)
0800124A	2024-03-18. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates A moaning, grinding, or groaning type noise while driving between 80 - 112 kph (50 - 70 mph). Noise is not heard when the front axle disconnect is disengaged. NOTE: This noise happens more as the ambient temperatures become less than 5 ? (41 ?). This bulletin involves reprogramming the DTCM with the latest available software.
1800424	2024-03-18. Service bulletin. 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: ? P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking. ? P06DD-00 - Engine Oil Pressure Control Circuit Performance/Stuck Off. ? P0461-00 - Fuel Level Sensor "A" Circuit Range/Performance. ? P051B-00 - Crankcase Pressure Sensor Circuit Range/Performance. ? P2F64-00 - Ion Sense Feedback Circuit A. ? P0331-00 - Knock Sensor 2 Circuit Range/Performance. ? P0300-00 - Multiple Cylinder Misfire. ? P2C90-00 - Crankcase Ventilation System - Hose "A" Disconnected. ? P0011-00 - Bank 1 Camshaft 1 Position Timing Over Advanced Or System Performance. ? 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.
0300124	2024-03-18. Service bulletin. Rattle Noise While Driving Customers may comment on the following: ? A rattling noise when driving. NOTE: This could be due to the rear driveshaft center support bearing not properly secured to the body. This bulletin involves inspecting and possibly tightening or replacing, the rear driveshaft center support bearing fasteners.
S2308000141	2024-01-16. Service bulletin. Park Brake Warning Lamp Illuminated and Flashing, Cluster Warning Message to ?Service Park Brake?
9100250	2024-01-16. Service bulletin. Camera - Rr view digital If a vehicle comes in with a Digital Rear View Mirror not working, please contact FCA REDACTED CONTENT If no response in 15 minutes, proceed with the repair. ~ Please take digital pictures of the what the failure looks like and the fix. Then email all pictures to FCA REDACTED CONTENT
S2208000172	2024-01-08. Service bulletin. Camera Display Has a Blue Screen When Using Surround, Front, Rear, or Park Assist Camera View
S2308000054	2024-01-08. Service bulletin. System Operation Obstructed or Blocked, ?Blind Spot Temporarily Unavailable, Sensor Blocked?, ?Automatic Emergency Braking (AEB) Limited Service Required? or ?Limited Functionality Clean Front Windshield? Displayed Momentarily on The Cluster