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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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By component

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Bulletins, newest first
S1808000221 Rev.2020-11-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Cluster Does Not Retain Selected Radio Theme Update
S20240000072020-11-30. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Customer Indicates There Is A Whistle Noise After The Vehicle Is Turned Off.
S20080001652020-11-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. Cannot Program Newly Installed Mopar Remote Start, Key Programming Fails, Keys Already Programmed Failing Response
S20080001592020-11-30. Service bulletin. ELECTRICAL SYSTEM:INTERIOR LAMPS/BULBS; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. CEL (Check Engine Lamp) On, Slightly Higher Than Expected Idle
S1923000014 Rev.2020-11-30. Service bulletin. STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Ram Box Lid Fitment And Or Closing Effort Issues
S1918000013 Rev.2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. No Crank No Start Condition. P0688 - Auto Shutdown Relay Sense Circuit Low Found In The PCM
S20080001512020-11-30. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PRESSURE/TEMPERATURE SENSOR. Outside Air Temperature Displayed On Cluster Or Radio Are Inaccurate
90043082020-11-30. Service bulletin. STRUCTURE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. COVER, Tonneau If the tonneau retaining strap is broken, there is a repair strap available. It is not necessary to replace the full tonneau cover.
08-083-202020-10-26. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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: U1440 - Implausible Transfer Case Ratio High Received. U0403-00 - Implausible Data Received From Tcase. C1403-92 - Transfer Case Range Position Sensor-Performance Or Incorrect Operation. 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 4WDAUTO. An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle. An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering. A ?Service 4WD? message/fault without commanding a transfer case shift.If only the ?Service 4WD? message/fault is displayed inthe Instrument Panel Cluster (IPC) and no other symptom/conditions are present, follow normal diagnostic procedures before updating theDTCM. 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. During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift.
08-082-202020-10-26. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SOFTWARE; ELECTRICAL SYSTEM; SERVICE BRAKES. Flash: Park Assist Module (PAM) Enhancement This bulletin involves updating the PAM software with the latest available software. Customers may experience an Electronic Vehicle Information Center (EVIC) message. These DTCs may be setting erroneously and this software enhancement will remove these DTCs. Upon further investigation the technician may find that one or more of the following DTCs have beenset:The following DTCs apply to 2019 model year vehicles only.B128E-25 - PTS Sensor 1-Signal Shape/Waveform Failure. B128F-25 - PTS Sensor 2-Signal Shape/Waveform Failure. B1290-25 - PTS Sensor 3-Signal Shape/Waveform Failure. B1291-25 - PTS Sensor 4-Signal Shape/Waveform Failure. B1292-25 - PTS Sensor 5-Signal Shape/Waveform Failure. B1293-25 - PTS Sensor 6-Signal Shape/Waveform Failure. B1295-25 - PTS Sensor 8-Signal Shape/Waveform Failure. B1296-25 - PTS Sensor 9-Signal Shape/Waveform Failure. B1297-25 - PTS Sensor 10-Signal Shape/Waveform Failure. B1298-25 - PTS Sensor 11-Signal Shape/Waveform Failure. B1299-25 - PTS Sensor 12-Signal Shape/Waveform Failure. Customers may experience the following:False detection by the front sensors due to locking onto random moving objects or while coming to a stop when braking hard. When backing up, the park assist feature will apply the brakes when noobject is behind the vehicle.
08-078-202020-10-26. Service bulletin. SUSPENSION. Flash: Air Suspension Control Module (ASCM) Updates This bulletin involves reprogramming the ASCM with the latest available software. Customers or technicians may experience a Malfunction Indicator Lamp (MIL) illumination after a battery disconnect. Upon further investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set along with a notification in the instrument panel cluster ?Service Air Suspension? after a battery disconnected and reconnect event.U0422-00 - Implausible Data Received From Body Control Module.
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.
S1823000056 Rev.2020-10-26. Service bulletin. LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH. (Revision D) Tailgate Ajar Indicator Light Is On And Or High Effort Required To Close And Latch The Tailgate
S2024000003 Rev.2020-10-26. Service bulletin. STRUCTURE; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. (Revision B) Customer Indicates A Whistle Noise Is Coming From The Dash During Certain Driving Conditions And HVAC Settings
S1908000041 Rev.2020-10-26. Service bulletin. ENGINE. (Revision A) Check Engine Lamp On, DTC?s P0480 Cooling Fan Circuit Open Or U0465 Loss Communication With Active Air Dam
S20080001442020-10-26. Service bulletin. FUEL SYSTEM, GASOLINE. External Fuel Pump Relay Kit Now Available
S20080001412020-10-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Navigation Shows Incorrect Location
S2025000001 Rev.2020-10-26. Service bulletin. ELECTRICAL SYSTEM. (Revision A) Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S20080001382020-10-26. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Turns On, Electric Start Stop (ESS) Disabled Message On Cluster While Driving, Remote Start Feature Inoperative Intermittently
S2008000123 Rev.2020-10-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. (Revision B) Radio Resets While Driving Under 1000 RPM
S1908000022 Rev.2020-10-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). (Revision A) Navigation Search Feature Does Not Work
S2024000003 Rev.2020-10-26. Service bulletin. STRUCTURE. (Revision A) Customer Indicates A Whistle Noise From Dash During Certain Driving Parameters.
90014962020-10-26. Service bulletin. ENGINE; EQUIPMENT. CAP, Engine Oil, Fill (O RING, Oil Filler Cap) For all model years, models and engines using oil fill caps with O-Ring seals: These O-Rings are now available for service. The green O-Ring is part 68029299A$. The black O-Ring is to be serviced by the green O-Ring. The blue O-Ring (thicker cross section than green & black) is part 68029300A$.~ If ordering this oil filler cap for a warranty repair due to a damaged/missing O-ring, please note that returned caps replaced for an O-ring issue will be subject to chargeback.
90041602020-10-26. Service bulletin. VISIBILITY. GLASS, Front Door For concern of front door window glass flaws such as bubbles or scratches, please contact FCA Redacted Content and email pictures of the concern to FCA Redacted Content. If no response in 15 minutes, proceed with repair.
90038172020-10-26. Service bulletin. FUEL SYSTEM, GASOLINE. Power Distribution Center If the PDC is being replaced due to a failed internal fuel pump relay, the relay can now be serviced as a separate component. Please use relay replacement KIT part number: 68510768A$.

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