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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
21-015-202020-05-18. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following:Bump/clunk felt during 1-2 or 2-3 upshifts. Delay/hesitation during a 3-2 shift. Bump or shutter felt during engine start/stop (ESS) situation.
18-020-202020-05-18. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customer may experience one or more of the following:Hesitation upon Engine Stop Start (ESS) autostart. Hesitation upon light acceleration below 20 MPH. Hesitation when accelerating while warming up, with coolant temperature below 60 ºC (140 ºF).
W142020-05-18. Service bulletin. ELECTRICAL SYSTEM. Customer Satisfaction Notification W14 Ground Bolt
S18080001752020-05-18. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. LED Front Fog Lamps Flicker Or Intermittently Light, Are Dim Or Inoperative. A U11E9, or B16FB-15 may be set
S20250000012020-05-18. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
21-015-202020-04-27. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following:Bump/clunk felt during 1-2 or 2-3 upshifts. Delay/hesitation during a 3-2 shift. Bump or shutter felt during engine start/stop (ESS) situation.
08-028-202020-04-27. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Flash: Hybrid Control Processor (HCP) Updates This bulletin involves updating the HCP with the latest available software. Customers may experience the following:Bump or shutter felt during engine start/stop (ESS) situation. The following enhancement is also included in this software update:Improvements to engine start stop quality to eliminate bumps or shutter. Improvements to motor rotor temperature model for robustness.
S18080001752020-04-27. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY; EXTERIOR LIGHTING. LED Front Fog Lamps Flicker Or Intermittently Light, Are Dim Or Inoperative. A U11E9, or B16FB-15 may be set
S20240000032020-04-27. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; BACK OVER PREVENTION. Customer Indicates A Whistle Noise From Dash During Certain Driving Parameters.
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.
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.
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
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
21-042-192019-12-16. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following:Harsh 3-2 downshift. Harsh 1-2 and 2-3 upshifts when cold. 4-5 shift clunk.
08-114-192019-12-16. Service bulletin. EQUIPMENT; 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 describe the following:Uconnect remote function inoperable when using the phone App
90040052019-12-16. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA. CAMERA (Rear) For concerns of back up camera flicker/blank/blue/black screen or camera inop, please ensure Radio is at latest software level. After update, system requires three sleep cycles to function properly. Please verify camera LVDS cable connection at camera and radio head unit. Also verify harness connection between chassis, body, and IP harness for bent pins or loose connection at XY400A, XY306A, XY552A. Please create and send a copy of the vehicle scan report and specify radio SW version and radio head unit ID to Bing Guo and Rafay Adil via email bingruo.guo@fcagroup.com (248) 500-7355 rafay.adil@fcagroup.com (248) 736-7059 Please call for any additional questions or assistance needed. If no response in 15 minutes, proceed with repair. Please be sure to attach a copy of the Vehicle Scan Report on the repair order.
08-099-192019-12-02. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Splash Screen Displays Incorrect Logo In The Electronic Vehicle Information Center (EVIC) This bulletin involves a vehicle reconfiguration for proper operation of the Instrument Cluster display. The customer may notice: When the vehicle is first started, Laramie is displayed in the cluster, when Lone Star should be displayed.Fig. 1. Cluster Splash Screen Logos
546382019-07-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. ASH RECEIVER - INSTRUMENT PANEL

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