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Service bulletins for the 2021 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.

1129 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
91001332023-07-31. Service bulletin. BACK OVER PREVENTION. ROCKER ARM ASSY - ROLLER ROCKER Case 1.- Before replacing the intake or exhaust rocker arms due to an abnormal ticking noise, please check that the INTAKE Hydraulic Lash Adjusters are not "collapsed". If a collapsed INTAKE HLA is found, replace all INTAKE HLAs on the suspect cylinder head (no need to replace rocker arms). The noise can occur at low or high RPMs, and at low or high temperatures. There are no Diagnostic Trouble Codes (DTC)s present. Case 2.- If the INTAKE camshaft or INTAKE rocker arm has excessive wear on the high lift profile (Rocker arm: slider, Camshaft: central lobe), replace the intake camshaft (1) in that cylinder head and all intake rocker arms (6).
91001422023-05-30. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES. Mirror
18048232023-05-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
S23250000042023-05-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Illuminated. Diagnostic Trouble Code (DTC) P2047 ? Reductant Injector 1/1 Circuit, Set.
S22080000802023-05-30. Service bulletin. ELECTRICAL SYSTEM. Ambient Air Temperature Missing, Malfunction Indicator Lamp (MIL) Lamp On, Diagnostic Trouble Code (DTC) P0070-15 Ambient Air Temperature Sensor Circuit-Circuit Short to Battery or Open, P0073 Ambient Air Temperature Sensor Circuit High
S22230000632023-05-30. Service bulletin. ELECTRICAL SYSTEM. Ambient Temperature Sensor Servicing.
S22230000482023-05-30. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER; SEATS. Heated Seat Cushion Element Inoperative
91001142023-05-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:AIR HANDLER/CHAMBER, DUCTS, AND VALVES; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Duct Assy Charge Air Cooler In If the seal is missing from inside a Henn connector, please search for the missing seal. It could have been pulled out while removal of the hose from the spigot if it was partially stuck to the spigot. It could have been blown into the hose or CAC. If that is the only concern with the CAC Hose Assembly, then replace the seal with a new replacement seal instead of replacing the entire hose assembly.
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.
91000972023-05-30. Service bulletin. EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. 3.5 INCH - SPEAKER ASSY P2 Before ordering a speaker part for crackles or rattling noises make sure to take the following steps: 1. Check for electrical harness routing too close to speaker's rear moving parts, improper connection, and/or harness pinch or damage. 2. Ensure no loose components, including trim grilles, fasteners, surrounding IP parts, etc. were found when removing the speaker. 3. Try "bad" speaker at another IP location and see if noise follows speaker. Try a different "good" speaker at "bad speaker location" and see if noise still happens at "bad" location. If even with this verification and adjustments the speaker sounds bad, test the individual speaker with the audio files provided in the Service Library Homepage under "Reference Materials" prior to replacement
08064232023-04-17. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Radio Over The Air Updating to QR40.12 Software Version Mobile Wi-Fi inoperative upon start up. ? Hotspot gives 9No Internet9 connection message on phone, when trying to connect to a device. 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 QR39.7 to QR40.12. NOTE: National launch for this FOTA update is expected to begin March 10, 2023. DISCUSSION: Vehicles sold in the U.S. and Canada can now receive software updates ?over-the-air?. Updates to software will occur in a phased roll-out. The software is updated through the built-in cellular modem in the radio.
23029232023-04-17. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses (Fig. 1) . This bulletin is to communicate the procedure for head lamp condensation clearing.
18016232023-04-17. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); EXTERIOR LIGHTING. 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 one or more ofthe following DTCs:P0335 - Crankshaft Position Sensor Circuit. P0339 - Crankshaft Position Sensor Intermittent. Other software enhancement included with this update: Idle stability improvements during Electronic Stability Control (ESC) events.
31001232023-04-17. Service bulletin. STRUCTURE. Aluminum Body Panel Corrosion Repair Aluminum corrosion or bubbling along the leading edge of hood, hinges or other exterior surface areas of the hinges, doors, fenders, swing gates or liftgates. NOTE: **Verify current warranty policy to determine if digital imaging pre authorization is required or Pre Approval is required from Regional Office depending on market.** This bulletin involves inspecting and if necessary removing corrosion and refinishing the suspect aluminum panels on the vehicle, hood, door, fenders, hinges, swing gates or liftgate panels.
S20250000012023-04-17. Service bulletin. BACK OVER PREVENTION; EXTERIOR LIGHTING. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S23080000222023-04-17. Service bulletin. ENGINE; ELECTRICAL SYSTEM. No Start, No Crank, Diagnostic Trouble Codes (DTC) P2504 Charging System Output High
S228A0000282023-04-17. Service bulletin. ELECTRICAL SYSTEM. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
S23230000172023-04-17. Service bulletin. POWER TRAIN. Enabling A New Power Side Step Module.
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
9003357a2023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY review and follow instructions from the latest STAR Online S1809000007 available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
90033572023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY (with mileage above 30,000) review and follow instructions from STAR Online S1809000007 REV. C available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
08-022-232023-02-13. Service bulletin. BACK OVER PREVENTION:SOFTWARE. Radio Over The Air Updating to 40.12 Software Version Mobile Wi-Fi inoperative upon start up. Hotspot gives 9No Internet9 connection message on phone when trying to connect to a device. 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 39.5 to 40.12.
08-014-232023-02-13. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Over The Air Updating to 39.92 Software Version Text displayed on radio ?Installing pop up message? for entire key cycle. Improper NAV search results. Lost SXM presets after remote start through Uconnect app. Rear shelf speaker crackles/popping noise. 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 37.4, 39.1, 39.5, 39.6, 39.62, 39.7 or 39.74 to 39.92.
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.**

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