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Service bulletins for the 2018 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.

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

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

Bulletins, newest first
08-229-222023-01-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Over The Air Software Version Update to 22.66 This bulletin provides information regarding the latest Firmware 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 from IR22.64 and IR22.65 to IR22.66. The national launch for the FOTA is expected to begin on January 09, 2023. ? Wi-Fi hotspot connection not working. ? No internet connection message on the phone when trying to connect to a device
S17080001182023-01-09. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Battery Drain Concern, Dual USB Port Normal Operational Draw, Extended Illumination Or Extended Operation After Key Off
S228A0000282022-12-12. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Remained On After Ignition Is Switched Off, Dead Battery from Excessive Radio Current Draw
S22230000632022-11-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. Ambient Temperature Sensor Servicing.
08094202022-10-17. Service bulletin. EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. 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.
18131222022-10-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set: P064F - Unauthorized Software/Calibration Detected. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P249E - Closed Loop Scr Reductant Injection Control At Limit - Flow Too High. P2509 - PCM/PCM Power Input Signal Intermittent. P0128 - Thermostat Rationality. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. In addition, the following software enhancements are also available:Scan Tool Fan Actuation Test fix. Enabling DTC P208B - Reductant Pump 1 Control Performance. Mass Air Flow (MAF) Sensor Out Of Range (OOR) low calibration. Idle based misfire retune. Abort timer for Selective Catalytic Reduction (SCR) Out NOx Sensor missing change to 70 seconds. Map SCR missing DTC/Fault (P1C54) to tampering inducement. Particulate Matter (PM) Sensor False Fault Improvement. CC inner loop used up faults. Ultrasonic Flow Meter (UFM) test results fix. Engine run state idle unstable software fix. Ability to write Engine Serial Number (ESN) through wiTECH. Add Diesel Exhaust Fluid (DEF)/Reagent type as a readable value in wiTECH. Fan actuation test. SCR missing tuning capability improvement. Smart tampering improvement.
08093212022-10-17. Service bulletin. ELECTRICAL SYSTEM. UAS, UAQ, UCS, UAV, UCV and UCQ 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. This is part of a two step FOTA update, first update brings software level to 22.61 and this second FOTA update will take the software to 22.64. National launch for this second step is May 24, 2021. Customers may experience one or more of the following:Navigation is incorrect or can not calculate route. GPS locations is inaccurate. Uconnect radio apps are all inoperable. Backup camera screen is blue (DT and KL). Green horizontal lines appear across screen (DT and KL). Anti-theft code request message. Backup camera screen is blank. Lines appear across screen. Radio control screen is blank or locked. Radio reset intermittently. Unable to adjust audio volume. Unable to switch modes between AM, FM, SAT or Media. In addition the following enhancements are included in this update:Carplay® connectivity improvement. Improvement to Bluetooth® phone pairing. Bluetooth devices unresponsive. Improved sound quality when using a Bluetooth phone.
S20080001132022-09-26. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:IGNITION. No Start Intermittently, Vehicle Requires Multiple Keyless Push To Start Attempts To Start Vehicle
S21080001632022-09-26. Service bulletin. ELECTRICAL SYSTEM. No Start, Cannot Complete Module Replace, Proxi Or Module Proxi Configuration
90044702022-09-26. Service bulletin. TRAILER HITCHES; ELECTRICAL SYSTEM:WIRING. CONNECTOR/WIRING, Trailer Tow If the connector or wiring is physically damaged, burned, melted or corroded, prior to replacing the part, please contact FCA Redacted Content If no response in 15 minutes, proceed with repair. Please send pictures of the failed part to FCA Redacted Content
S21080001442022-09-26. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. No Start, No Crank
90043862022-09-26. Service bulletin. ELECTRICAL SYSTEM:WIRING. WIRING, Body Before replacing this harness, please contact FCA Redacted Content to see if a repair kit is available for your application. If no response in 15 minutes, proceed with repair. Please email pictures of harness defects to FCA Redacted Content
S20080001132022-09-26. Service bulletin. ELECTRICAL SYSTEM. No Start Intermittently, Vehicle Requires Multiple Keyless Push To Start Attempts To Start Vehicle, Intermittent Key Not Detected Message
S16080002262022-09-26. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Battery Tester Warranty Code Procedures, Midtronics Charger Update Process
S160800022612022-09-26. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Battery Tester Warranty Code Procedures, Medtronic Update Process
S21080000932022-09-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Apple CarPlay Does Not Work Or Not Connecting
S22080000732022-09-26. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM; UNKNOWN OR OTHER. No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting
S17080001182022-09-26. Service bulletin. ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS:ACCESORY POWER OUTLET/JACK/PORT/USB/SAE/CIGARETTE LIGHTER; UNKNOWN OR OTHER. Battery Drain Concern, Dual USB Port Normal Operational Draw, Extended Illumination Or Extended Operation After Key Off
08-133-212022-08-22. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. UAQ and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: 39.6.The repair procedure must be followed step by step. If the radio is not updated with the correct software level at the correct time the radio can be damaged. If the radio was damaged by not following the repairprocedure the radio may need to be replaced. Customers may experience one or more of the following: Lost radio presets. SXM favorite song not displaying/playing. Radio display screen is black, intermittent. Radio freeze intermittent. Incorrect navigation address/location/directions. Bluetooth pair or connection issue. Radio channel change by itself. SXM icon inoperative. Backup camera has black display screen. High pitch chime noise. Contact list not loading. Device not supported message. Remote app inoperative. Travel-Link fuel price incorrect. Backup camera gridlines missing. Unable to adjust volume. In addition the following enhancements are included: Heavy Duty (HD)Truck USB HUB improvements. HD Truck heated steering wheel improvements.
08-109-172022-08-08. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE. UAS, UAQ, UCS and UCQ Radio Over The Air Software 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 following enhancement are included in this update:Improved sound quality when using the Bluetooth® phone.
08-109-172022-07-25. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. UAS, UAQ, UCS and UCQ Radio Over The Air Software 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 following enhancement are included in this update:Improved sound quality when using the Bluetooth® phone.
90038142022-07-25. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Power Distribution Center For 2018 D2/DD/DF/DJ/DP, prior to replacing the Power Distribution Center (PDC), you MUST contact the STAR Center (800) 850-7827 for diagnostic assistance and pre- authorization. Failure to do so WILL result in your warranty claim being rejected.
S228A0000042022-06-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Panasonic VP4R Wi-Fi New Enrollment Pause
90044702022-06-27. Service bulletin. ELECTRICAL SYSTEM:WIRING; TRAILER HITCHES. CONNECTOR/WIRING, Trailer Tow If the connector or wiring is physically damaged, burned, melted or corroded, prior to replacing the part, please contact FCA Redacted Content If no response in 15 minutes, proceed with repair. Please send pictures of the failed part to FCA Redacted Content
S22080000732022-05-31. Service bulletin. ELECTRICAL SYSTEM. No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting

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