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Service bulletins for the 2020 Ram 1500

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.

1228 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
91001612023-05-30. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS. Parking Assist For any of the following concerns: (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) WARNING (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) INOP (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) SERVICE (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) DOES NOT OPERATE PROPERLY Please contact FCA Redacted Content prior to part replacement. If no response in 15 minutes, proceed with repair.
S228A0000282023-04-17. Service bulletin. ELECTRICAL SYSTEM. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
S23230000162023-04-17. Service bulletin. ELECTRICAL SYSTEM. Power Side Step Does Not Operate Or Operates Intermittently
S14080003842023-04-17. Service bulletin. ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
08-008-232023-02-13. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION; WHEELS; STEERING. UAS and UCS Radio Enhancements Customers may experience one or more of the following: **Wi-Fi hotspot connection failure. Speaker popping, crackle noise during Voice Recognition (VR) response and navigation guidance. Mobile Station Integrated Services Digital Network (MSISDN) missing from radio, no connected services working.** Wireless connectivity pairing and/or connection issues. Lost radio presets. Radio channels change by itself. SXMT icon inoperative. SXMT favorite song not displaying/playing. High pitch squeal, pop or hum noise from speakers. Anti-theft code request message. Lines appear across screen. Radio will not switch modes between AM, FM, SAT or Media. Performance control home screen shows ?Norm? mode for engine/transmission even when the vehicle is in ?Drag? mode (LA, LD, LX only). Can not change the time on the clock (LA, LD and LX only). USB hub inoperable (D-Trucks only). Backup camera gridlines missing (D-Trucks only). Device not supported message (D-Trucks only). Remote app inoperative (D-Trucks only). Unable to adjust volume (D-Trucks only). Heated steering wheel inoperable (D-Trucks only). In addition, the following enhancement are included in this update: CarplayT connectivity improvements. Improvement to wireless connectivity phone pairing. Improved sound quality when using a wireless connectivity phone. **This bulletin involves inspecting and if required, updating the radio software level to 40.1. Depending on the radio?s current software level the radio may need a one or two USB update.**
18-002-232023-02-13. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC; PARKING BRAKE. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: **P2183 - Engine Coolant Temperature Sensor 2 Circuit Performance. P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P208B - Reductant Pump 1 Control Performance. P0403-00 - EGR Control Circuit Open ? Disabled Fault.** P225D-00 - NOX Sensor 1/1 Performance Signal Stuck Low. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance Bank 1. P200B-00 - Intake Manifold Runner Performance Bank 2. P2610 - PCM Internal Engine Off Timer Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P2D2D-00 - Cold Start Intake Manifold Runner Performance Bank 1. P2D2E-00 - Cold Start Intake Manifold Runner Performance Bank 2. P2199-00 - Intake Air Temperature Sensor 1/2 Correlation. P22FA-00 - NOX Sensor Performance Slow Response High To Low Bank 1 Sensor 1. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P0087-00 - Fuel Rail Pressure Too Low. P0128-00 - Thermostat Rationality (additional software enhancement). P0300-00 - Multiple Cylinder Misfire (cold ambient temperature). P0301-00 - Cylinder 1 Misfire (cold ambient temperature). P0302-00 - Cylinder 2 Misfire (cold ambient temperature). P0303-00 - Cylinder 3 Misfire (cold ambient temperature). P0304-00 - Cylinder 4 Misfire (cold ambient temperature). P0305-00 - Cylinder 5 Misfire (cold amb
S1918000013 Rev.2023-02-13. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. Crank, No Start Condition, Diagnostic Trouble Code (DTC) P0688 - Auto Shutdown Relay Sense Circuit
08214222023-01-23. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; ELECTRICAL SYSTEM. Radio Over The Air Updates to JR34.3/JR34.4 and JR34.41
08095222023-01-17. Service bulletin. ELECTRICAL SYSTEM. UAX And UCX KR20.12 To PR40.1 Software Version Updates
08144222023-01-17. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Flash: Drivetrain Control Module (DTCM) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. The technician may find one or more of the following DTCs: C1415-92 - Transfer Case Motor Current-Performance or Incorrect Operation. U1440 - Implausible Transfer Case Ratio High Received. U0403-00 - Implausible Data Received From T-case. C1403-92 - Transfer Case Range Position Sensor-Performance Or Incorrect Operation(2019-2020 Vehicles Only). If only DTC C1403 is present, follow normal diagnostic procedures before updating the DTCM. In addition the customer may describe one or more of the following:Traction Control System light is illuminated. A driveline bump can be heard/felt occasionally when the driver is steady on the throttle at about 20-30% on a flat road while in 4WD AUTO(2019-2020 Vehicles Only). An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle(2019-2020 Vehicles Only). An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering(2019-2020 Vehicles Only). A ?Service 4WD? message/fault without commanding a transfer case shift(2019-2020 Vehicles Only).If only the ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC) and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). The blinking of the ?4WD Low? and ?4WD High? indicator lights at the same time, on the transfer case selector switch.If both 4WD indicator lights on the transfer case selector switch are blinking and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift(2019-2020 Vehicles Only).
S22080001382023-01-17. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Decreased Remote Start And RKE Range. Tire Pressure Sensors Values Are Not Displayed
08119212023-01-17. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; 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:DT with UAX and UCX - 34.31. All other vehicles and radio combinations - 34.2. The national launch for the FOTA will begin July 21, 2021. Customers may experience one or more of the following: SOS, Automatic SOS (ASOS) , assist calls not showing correct location(DT Vehicles with UAX and UCX Only). GPS inaccuracies(DT Vehicles with UAX or UCX Only). Uconnect radio apps are inoperable(DT Vehicles with UAX or UCX Only). SXM® button are greyed out(DT Vehicles with UAX or UCX Only). Intermittently, SXM loading screen is stuck(DT Vehicles with UAX or UCX Only). 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.
21025212023-01-17. 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 experience one or both of the following conditions: A Malfunction Indicator Lamp (MIL) event or failure with no Diagnostic Trouble Codes (DTCs) and the vehicle has less than 644 km (400 miles) on the odometer indicates it is likely the vehicle has experienced an unintentional code clear event. Harsh 3-2 downshift. Harsh 1-2 and 2-3 upshifts when cold. 4-5 shift clunk.
08117212023-01-17. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM. UAS and UCS Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to 39.6 Customers may experience one or more of the following: Intermittent, black radio display screen. Intermittent, radio freezes. Bluetooth® pairing and/or connection issues. Lost radio presets. Radio channels change by itself. SXM icon inoperative. USB hub inoperable. Heated steering wheel inoperable. SXM favorite song not displaying/playing. High pitch chime noise. Contact list not loading. Device not supported message. Remote app inoperable. Travel-link fuel price incorrect. Navigation displays incorrect location. Backup camera grid lines missing. Unable to adjust volume.
08116212023-01-17. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. Flash: Driver Door Module (DDM) and Passenger Door Module (PDM) Updates This bulletin involves reprogramming the DDM and PDM with the latest available software. Customers may experience one or more of the following:Exterior mirrors do not return to the original position after shifting out of reverse gear. Exterior mirrors continue to tilt downwards even after shifting out of reverse gear.
S21180000112023-01-17. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL. Diagnostic Trouble Code (DTC) P049B ? EGR B Insufficient Flow Detected, Additional Diagnostics.
S21080001632023-01-17. Service bulletin. ELECTRICAL SYSTEM. No Start, Cannot Complete Module Replace, Proxi Or Module Proxi Configuration
18008212023-01-17. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, DIESEL. 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: P225D-00 - Nox Sensor 1/1 Performance - Signal Stuck Low. P249C-00 - Excessive Time to Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. Improved VGT cleaning to reduce false failures for P00AF field issue. P0106-00 - Manifold Absolute Pressure Sensor Performance. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance - Bank 2. P2610 - PCM Internal Engine Off Timer Performance. Change DTC number from P0101-00 to P0109-00 - Mass Air Flow Sensor Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P2D2D-00 - Cold Start Intake Manifold Runner Performance Bank 1. P2D2E-00 - Cold Start Intake Manifold Runner Performance Bank 2. P2199-00 - Intake Air Temperature Sensor 1 / 2 Correlation. P22FA-00 - NOX Sensor Performance - Slow Response High to Low Bank 1 Sensor 1. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P0087-00 - Fuel Rail Pressure Too Low. P0128-00 - Thermostat Rationality (additional software enhancement). P0300-00 - Multiple Cylinder Misfire (cold ambient temperature). P0301-00 - Cylinder 1 Misfire (cold ambient temperature). P0302-00 - Cylinder 2 Misfire (cold ambient temperature). P0303-00 - Cylinder 3 Misfire (cold ambient temperature). P0304-00 - Cylinder 4 Misfire (cold ambient temperature). P0305-00 - Cylinder 5 Misfire .
S21180000062023-01-17. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P20C6 ? Reductant Heater 4 Control Circuit, Set.
9004376-12023-01-17. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:PUMP. PUMP, Vacuum Prior to replacing the vacuum pumps, please contact or email FCA Redacted Content. If no response in 15 minutes, proceed with repair.
S228A0000172023-01-09. Service bulletin. ELECTRICAL SYSTEM. Battery Drain Suspected or "Identified" From USB or Media Hub
S22080001132023-01-09. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. No Start, DTC P0615 Starter Control Circuit Open
08007202023-01-09. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; BACK OVER PREVENTION; PARKING BRAKE. UAQ and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: UAQ radios - 34.2. UCQ - 30.24. 2019 LA and WD with UAQ or UCQ radios and 2020 WD with UCQ radio has been removed from the service bulletin and are now covered under a safety recall. Please refer to published information in DealerCONNECT/Service Library for more details. Customers may experience one or more of the following:Speaker crackling noise on non amplified vehicles (UAQ Only). Active call not transferred to vehicle Bluetooth®(UAQ Only). Voice Recognition (VR) not understanding commands to switch sources (UAQ Only). Bluetooth phonebook not available (UAQ Only). "Setting" button removed after ignition cycle (UAQ Only). Coolant temperature value incorrect (UAQ Only). Blank display screen at start up.
18011202023-01-09. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience the following: A hesitation or rough feeling during engine-starting. Extended or longer than usual engine crank time. This conditions usually happens after a cold engine start and the vehicle is turnedoff and turned on within 3-5 minutes this will result in an extended or longer crank than usual before the vehicle restarts.
S20080001052023-01-09. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Remote Start Inoperative

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