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Service bulletins for the 2021 Ram 2500

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
S25050000032025-12-17. Service bulletin. SERVICE BRAKES. Diagnostic Trouble Code (DTC) C0050-00-Brake System Hydraulic Leak Set After Recent Repair.
1036222025-03-04. Service bulletin. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
1036212025-03-04. Service bulletin. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
993992024-07-31. Other. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
994002024-07-31. Other. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
90044332023-09-25. Service bulletin. SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM; SERVICE BRAKES; ELECTRICAL SYSTEM. PUMP, Vacuum For DTC Code P258B - ELECTRONIC VACUUM PUMP PERFORMANCE. Due to brake vacuum pumps returned with trouble not found, please follow the proper diagnostics outline in the service library this also includes checking all electrical and vacuum hose connections prior to replacement of the vacuum pump. This will avoid unnecessary repair and potential charge back on the vacuum pump.
S1623000028 Rev.2023-02-13. Service bulletin. VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S2118000001RevB2023-01-17. Service bulletin. EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC; BACK OVER PREVENTION. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P0471 ? Exhaust Pressure Sensor 1 Performance, Set.
S21230000552023-01-17. Service bulletin. ENGINE; SERVICE BRAKES. HD Truck Brake Pedal Feel On Gas Engine Equipped
S21080001702023-01-17. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
08-234-222023-01-17. Service bulletin. ENGINE AND ENGINE COOLING; STEERING; PARKING BRAKE; WHEELS; ELECTRICAL SYSTEM; BACK OVER PREVENTION. UAV and UCV 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.** ? Lost radio presets. ? SXM favorite song not displaying/playing. ? Incorrect navigation address/location/directions. ? Lost navigation settings. ? SXM icon inoperative (D-Truck). ? Radio display screen is black when the ignition is on (Rear View Camera (RVC) not affected (D-Truck)). ? Radio freeze intermittent (RVC not affected (D-Truck)). ? Wireless connectivity pair or connection issue (D-Truck). ? Radio channel changes by itself (D-Truck). ? Backup camera has black display screen, or Only displays Check Entire Surroundings with black screen (occurs when vehicle is shifted immediately to reverse upon key-on before RVC signal is received, recoverable with key cycle) (D-Truck). ? High pitch chime noise (D-Truck). ? Contact list not loading (D-Truck). ? ?Device Not Supported? message (D-Truck). ? Remote app inoperative (D-Truck). ? Travel-Link fuel price incorrect (D-Truck). ? Backup camera gridlines missing (D-Truck). ? Unable to adjust volume (D-Truck). ? Radio may reset/reboots, turn itself off and then back on again (D-Truck). ? High pitch squeal, pop or humming sound coming from all of the speakers (WK RU Only). ? Radio display screen is black, intermittent (RVC not affected (WK RU Only)). ? Radio freeze intermittent (RVC not affected (WK RU Only)). ? Navigation stuck on loading screen or not appearing at all (WK RU Only). ? Radios resets when a wireless connectivity paired phone receives two text messages one after another simultaneously after approximately seven seconds. (ABD sales code). ? Speaker crackling noise on non amplified vehicles (WK RU, UAV Only). ? Active cal
S21080001702022-09-26. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
S22230000462022-09-26. Service bulletin. VEHICLE SPEED CONTROL; PARKING BRAKE. Upper Glove Box Door Does Not Open When Button Is Pressed
S2121000008RevC2022-09-26. Service bulletin. SERVICE BRAKES; EXTERIOR LIGHTING; POWER TRAIN. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P0765 ? UD Solenoid Circuit, P0871 ? Transmission Fluid Pressure Sensor/Switch ?C? Circuit Performance, and/or P0755 ? 2C Solenoid Circuit, Set.
18-071-212022-08-22. Service bulletin. EXTERIOR LIGHTING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; BACK OVER PREVENTION. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/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 Diagnostic Trouble Codes (DTCs) have been set: P0607-00 - ECU Internal Performance. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance(ETL Sales Code only). The following improvements are also included in this update: Oil pressure switch modifications. Urea (DEF fliud) level sensor calibration update, to help prevent bumps in DEF level gauge.
S21090000012022-07-18. Service bulletin. SERVICE BRAKES. Customer may complain of a MIL lamp on. Upon further investigation there could be a fault code in the PCM for P1524 ? Oil Pressure Out of Range ? Camshaft Advance/Retard Disabled.
18-093-222022-06-27. Service bulletin. ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule (ECM/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 moreof the following DTCs have been set: P0299 - Turbocharger Underboost. P0401 - EGR System Performance. P0755 - 2C Solenoid Circuit. P0765 - UD Solenoid Circuit. P244A - Diesel Particulate Filter Differential Pressure Too Low. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P242F - Diesel Particulate Filter Restriction - Ash Accumulation. P1451 - Diesel Particulate Filter System Performance. P2463 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1. P0607-00 - ECU Internal Performance. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance(Sales Code ETL Only). In addition, the customer may notice one or more the following conditions: Idle instability. Air handling bump after startup. Harsh shifts during garage shift tip-in. 2-1-2 gear hunting at low speeds, especially on grades. Driveline ?clunk? ?bump? during D-R and R-D GarageShifts. Harsh 5-3 downshift. 2-1 ERS downshift with exhaust brake on, performance improvement. Intermittent shift bump. The following improvements are also included in this update: Fuel System Run-Up Test routine, wiTECH improvement. wiTECH PCM data improvements. wiTECH cylinder cut-out routine, wiTECH improvement. Oil pressure switch modifications. Urea (DEF fluid) level sensor calibration update, to help prevent bumpsin DEF level gauge.
90045292022-06-27. Service bulletin. SERVICE BRAKES. CALIPER ASSEMBLY, Disc Brake, Front/Rear For brake feel/sensation concerns, please call engineering FCA Redacted Content before performing repairs. If no response in 15 minutes, proceed with repair.

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