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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.

By type

By component

By trouble code

By topic

Bulletins, newest first
S20230000192020-04-27. Service bulletin. STRUCTURE:BODY:ROOF AND PILLARS. Noise From Headliner Roof Area
S20080000252020-04-27. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. Windshield Washer Spray Pattern Has Reduced Flow
S18230000292020-04-27. Service bulletin. STRUCTURE:BODY:DOOR; STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS. Water Leak Carpet Wet At Front And Or Rear Seats
S19080001092020-04-27. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. Ambient Air Temperature Displayed Temperature Is Inaccurate
S20250000012020-04-27. Service bulletin. EXTERIOR LIGHTING; BACK OVER PREVENTION. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S20080000042020-04-27. Service bulletin. WHEELS; STEERING. Left Side Steering Wheel EVIC And Radio Switches Are Inoperative
S20180000022020-04-27. Service bulletin. EXTERIOR LIGHTING. Malfunction Indicator Lamp (MIL) Illuminated. Fuel Injection Quantity Diagnostic Trouble Codes (DTCs) Set.
90042422020-04-27. Service bulletin. EQUIPMENT. Tonneau Cover - Hard Folding For Replacement Parts and Service Information, please contact the tonneau cover manufacturer Fold-a-Cover at 1-800-322-0522.
90039502020-04-27. Service bulletin. STRUCTURE:BODY:TAILGATE. Tailgate Cable 1. If replacing this cable for slack or loose on one side; first swap the cables left to right; does the issue follow the cable? a). If Yes, replace cable with slack. b). If No, a new shorter service cable PN 68488335A$ will resolve the issue if slack is greater than 18 mm of sag when compared to a straight edge from both ends of the cable. 2. If the issue improves following the left to right swap no further repair needed.
90040122020-04-27. Service bulletin. LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH. Power Latch W/AJAR Prior to ordering this part for a customer stating the Tailgate will not auto release or Ajar light is on when the tailgate is closed, first try adjusting the tailgate strikers to minimize the force required to close. The striker must be centered up/down in the latch opening. You have to balance tailgate flushness and closing effort by moving the strikers fore or aft. Striker position also affects closing effort. In most cases moving the right side striker rearward or the left side forward fixes the issue and maintains flushness within tolerance. On the standard tailgate, the ajar switch is on the right side latch only. Please contact FCA Redacted Content for diagnostic assistance and information to assist in problem resolution. If no response in 15 minutes, proceed with repair.
90042382020-04-27. Service bulletin. EXTERIOR LIGHTING. Headlamp After performing the headlamp condensation clearing service procedure, If the headlamp is being replaced for a Moisture/Condensation issue, please e-mail and call FCA Redacted Content and send pictures of the Moisture/Condensation issue to FCA Redacted Content and FCA Redacted Content as part of the repair. If no response in 15 minutes, proceed with repair.
90042342020-04-27. Service bulletin. SEATS. COVER, Front Seat Cushion For a seat cover that is loose at the seat frame attachment clips, please perform TSB 23-025-19 Seat cover replacement is not required
18-011-202020-04-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience the following:Extended or longer than usual engine crank time.This conditions usually happens after a cold engine start and the vehicle is turned off and turned on within 3-5 minutes this will result in an extended or longer crank than usual before the vehicle restarts.
08-017-202020-04-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. Flash: Hybrid Control Processor (HCP) Updates This bulletin involves updating the HCP with the latest available software. 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:P0731-00 - Gear 1 Shift Incorrect Ratio. P0733-00 - Gear 3 Shift Incorrect Ratio (while operating in 4-Lo range). P0734-00 - Gear 4 Shift Incorrect Ratio. The customer may describe the following:Bump/clunk felt during 1-2, 2-3, 4-5 or 5-6 upshifts. Bump during coast down with medium to heavy acceleration. The following enhancement is also included in this software update:Improvements in prematurely setting the following DTCs: P0731, P0733, P0734. Improvements for the regen blending driveability. Improved 1-2, 2-3, 4-5 or 5-6 upshifts to eliminate bump/clunk felt during these upshifts.
21-007-202020-04-06. Service bulletin. POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. 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:P0731-00 - Gear 1 Shift Incorrect Ratio. P0733-00 - Gear 3 Shift Incorrect Ratio (while operating in 4-Lo range). P0734-00 - Gear 4 Shift Incorrect Ratio. The customer may describe the following:Bump/clunk felt during 1-2, 2-3, 4-5 or 5-6 upshifts. The following enhancement is also included in this software update:Improvements in prematurely setting the following DTCs: P0731, P0733, P0734. Improved 1-2, 2-3, 4-5 or 5-6 upshifts to eliminate bump/clunk felt during these upshifts.
18-010-202020-04-06. Service bulletin. POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may comment on one or more of the following:Bump sensation during a coast down with light acceleration. Abnormal vibration when accelerating lightly during stop and go driving conditions.
21-008-202020-04-06. Service bulletin. POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. 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:P0731-00 - Gear 1 Shift Incorrect Ratio. P0733-00 - Gear 3 Shift Incorrect Ratio (while operating in 4-Lo range). P0734-00 - Gear 4 Shift Incorrect Ratio. The customer may describe the following:Bump/clunk felt during 1-2, 2-3, 4-5 or 5-6 upshifts. The following enhancement is also included in this software update:Improvements in prematurely setting the following DTCs: P0731, P0733, P0734. Improved 1-2, 2-3, 4-5 or 5-6 upshifts to eliminate bump/clunk felt during these upshifts.
08-014-202020-04-06. Service bulletin. ELECTRICAL SYSTEM; SEATS. Body Control Module (BCM) Reconfigure for Enabling the Auto-On Comfort Settings This bulletin involves reconfiguring the BCM and possibly a radio reset, to enable the auto-on comfort settings. Customers may comment on one or more of the following:If below 4 °C (40 °F), the heated seats or heated steering wheel turn on by themselves. If above 26 °C (80 °F), the vented seats turn on by themselves. Cannot turn off the auto-on comfort feature. With the symptom/condition listed above, there?s no setting in the radio to turn the auto-on comfort feature off.
VE62020-04-06. Service bulletin. EQUIPMENT. Customer Satisfaction Notification VE6 Missing Side Steps
VF22020-04-06. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. Customer Satisfaction Notification VF2 Auto High Beam Headlamp Control
S20080000152020-04-06. Service bulletin. ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). Electronic Stability Control (ESC) Indicator Light Illuminated, DTC?s U1440, U0403 And No (DTCM) Drive Train Control Module Codes Present
S20080000132020-04-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Key Programming, Security Pin Request, Pin Invalid
S19080000222020-04-06. Service bulletin. EQUIPMENT. Navigation Search Feature Does Not Work
S14080003842020-04-06. Service bulletin. ELECTRICAL SYSTEM. Intelligent Battery Sensor-IBS Installation, Battery Charging Message, Start Stop Charging Warning Lamp Illuminated On Stop Start Equipped Vehicles
S18050000062020-04-06. Service bulletin. ELECTRICAL SYSTEM. ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE

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