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Service bulletins for the 2020 Ram 4500

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.

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

By type

By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
90043692021-05-24. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION. CAMERA (surround view - digital) When vehicle is equipped with surround view system (XAK sales code) and rear camera is not functioning - If rear camera is not functioning we would expect to see these Diagnostic Trouble Code (DTCs) set by the Central Vision Processing Module (CVPM) - B217A-92 Rear Camera-Performance or Incorrect Operation U0264-00 Lost Communication With Camera Module - Rear 1. Take picture of head unit display so we can verify what part of the image is not functioning (Surround View vs. Rearview Camera) 2. Take vehicle scan and config report so we can verify s/w, DTCs, and vehicle config 3. If rear camera is not functioning, disconnect and reconnect the camera to ensure that the same camera is still not functioning. We want to ensure that the connection at the rear camera is secure. 4. Send information to FCA Redacted Content.
08-029-21 REV. A2021-04-26. Service bulletin. VEHICLE SPEED CONTROL; AIR BAGS; VISIBILITY; ELECTRICAL SYSTEM. Door Control Module Window Inoperative This bulletin involves replacing one or both of the door modules. Technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: B18BA-12 - Window Control - Circuit Short to Battery B18BA-13 - Window Control - Circuit Open In addition the customer may notice one or more of the following: Driver and/or passenger windows stop working. If the window switch is held in the up position for at least two seconds,the obstruction auto-down function may not work. Windows may go up slower than expected.
08-052-212021-04-26. Service bulletin. SEAT BELTS; ELECTRICAL SYSTEM. Flash: Radio Frequency Hub Module (RF-HUB) Updates This bulletin involves reprogramming the RF-HUB with the latest software available. The customer may experience the following:The key fob won't unlock the doors while the vehicle is running and after a remote start.
S21080000522021-03-15. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER; ELECTRICAL SYSTEM. Heated Seat LED Indicator Turns On And Back Off. One Or More Heated Seat DTC?s
S2008000041 Rev.2021-03-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. Device Not Supported Message On Radio Screen
22-002-202021-03-01. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Tire Pressure Monitoring System (TPMS) Light On In Instrument Panel Cluster (IPC) This bulletin involves replacing and programing all Tire Pressure Monitor (TPM) Sensors. The customer may notice:The TPMS light illuminated in the instrument panel.
S2008000182 Rev.2021-03-01. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. Driver Or Passenger Power Windows Do Not Go Up Or Down
90043342021-03-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Power Window Regulator or Motor Owners may complain that the Driver and or Passenger Windows are inoperative. Technician may find DTC?s B18BA-12 - Window Control - Circuit Short to Battery, B18BA-13 - Window Control - Circuit Open (stored or active). Replace the DDM or PDM per detailed repair information in Service Library or reference Star Online Publlication S2008000182. Replacing regulators or motors will not correct this issue.
08-015-212021-02-16. Service bulletin. ELECTRICAL SYSTEM. Radio Enhancements This bulletin involves updating the radio software level to 1848.34. Customers may experience one or more of the following:Radio display screen flickers. Radio resets with RPM less than 1000 RPM (DT and JL with 3.0L Diesel). Clock loses 6 seconds per day (JL with 5 inch screen). Ghost Touch, features, modes and App?s changing without drivers input. Bluetooth pop noise. Pop message ?SXM Wait? displayed for extended period of time. The radio resets.
21-004-212021-02-16. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may comment on one or more of the following:Poor shift quality. Shift or gear hunting.
S21080000222021-02-16. Service bulletin. ELECTRICAL SYSTEM. Service Trailer Brake Warning Message Displayed On The Cluster
08-101-202020-12-28. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE; ELECTRICAL SYSTEM. Heating, Ventilation and Air Conditioning (HVAC) Controls Inoperative This bulletin involves replacing the HVAC module. Customers may experience not being able to change the HVAC modes, both on the radios display or HVAC controls.
S20080001862020-12-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM. Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
S20080001722020-12-28. Service bulletin. ELECTRICAL SYSTEM. Radio Screen Flickering When Using Apple CarPlay Or Android Auto.
08-101-202020-12-21. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Heating, Ventilation and Air Conditioning (HVAC) Controls Inoperative This bulletin involves replacing the HVAC module. Customers may experience not being able to change the HVAC modes, both on the radios display or HVAC controls.
S20080001862020-12-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
S20080001722020-12-21. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Screen Flickering When Using Apple CarPlay Or Android Auto.
08-094-202020-11-30. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT. Flash: Drivetrain Control Module (DTCM) Update This bulletin involves reprogramming the DTCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set::If the customer has any concerns with the transfer case or if the tech performs any repairs on the transfer case, the software must be updated.C140E - Transfer Case Motor Blocked. If DTC C140E is present, follow normal diagnostic procedures before updating the DTCM.In addition the customer may describe the following:The ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC). Transfer case shift fork tabs broken during range shift. Noisy (clunking/ratcheting) transfer case range shifts. Failure to complete transfer case range shifts. The following software enhancement is available:This update will help reduce premature transfer case failure.
08-088-202020-10-26. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Squeak, Rattle, Or Metallic Tapping Sound From Under The Instrument Panel This bulletin involves Inspecting and replacing the AMP bracket fastener. The customer may describe one or both of the following:A bolt may have been found in the driver foot well. A squeak, rattle or metallic tapping sound from under the instrumentpanel (this is due to amp bracket being loose and hitting against the IP Cross Car Beam). They may mention noise worsens during whentraveling on rough/bumpy roads.
08-048-20 REV. A2020-10-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. UAX, UCX, UAV and UCV Radio Over the Air Software Version Updates This bulletin provides information regarding the latest Flash Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated to 34.2. Customers may experience one or more of the following:Uconnect App inoperative(DT Vehicles Only). Voice Recognition (VR) inoperative(DT Vehicles Only). Radio resets (DT Vehicles Only). Radio locks up, freezes or resets. Bluetooth device is slow to pair, or does not pair. GPS unable to load and find locations. Loss of saved radio presets. Display screen is back with no backlighting. No audio output coming from the radio. Cannot control audio volume. Rear view camera display will not turn off.
S20250000072020-10-26. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P218F ? Reductant No Flow Detected set.
18-060-202020-09-28. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; ENGINE. 6.7L Cummins Engine High Pressure Fuel Injection Pump Identification Differences This bulletin provides information regarding the identification differences in the high pressure fuel injection pumps between the new style Symetrical Cam design pump and the old syle Asymetrical Cam design used on the 6.7L Cummins in the 2019 and 2020 HD Trucks. The following information is intended to eliminate confusion and possible noise complaints shortly after pump replacement or ECM reprogramming.
S20080001302020-09-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Radio UConnect GPS Based Trip Computer Missing
S20080001142020-09-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. SXM Is Inoperative, Button Grayed Out Or Stuck In Loading Screen
S20080001132020-09-28. Service bulletin. ENGINE; ELECTRICAL SYSTEM. No Start Intermittently, Vehicle Requires Multiple Keyless Push To Start Attempts To Start Vehicle

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