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Service bulletins for the 2020 Ram 3500

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.

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

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
18-048-202020-06-22. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; ENGINE. 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: P24A5-00 - EGR Cooler Bypass Bank 1 Control Stuck. P20EE-00 - NOx Catalyst Efficiency Below Threshold. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance. P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation. P0420-00 - Catalyst System Efficiency Below Threshold Bank 1. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P0191-00 - Fuel Rail Pressure Sensor Circuit Performance. P0461-00 - Fuel Level Sensor 1 Performance. P0401-00 - EGR System Performance. P208B-00 - Reductant Pump 1 Control Performance. The following improvements are also included in this update:Hydrocarbon Desorption Mode, will resume after key cycle. Engine stumble improvement, during engine warm up. Smoke improvement during highway driving and lower altitudes (sea level).
18-005-20 REV. A2020-05-26. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the correct software. This vehiclemay have been programmed with incorrect software. The customer may experience Active Noise Control (ANC) system not working. Upon further investigation the technician may find the followingDiagnostic Trouble Codes (DTCs) has been set:B154F-64 - Lost Crankshaft Pulse Signal-Signal Plausibility Failure B154F-24 - Lost Crankshaft Pulse Signal-Signal Stuck High.
OD628912020-04-06. Service bulletin. POWER TRAIN. Safety Recall W03 2019-2020 D Transmission Valve Body Recommended Operation Ahead of Recall Launch
90041572020-04-06. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); POWER TRAIN; SUSPENSION; ELECTRICAL SYSTEM. MODULE, Air Suspension, [SEB] For replacement of Air Suspension Control Module (ASCM) due to the following DTCs, please contact FCA Redacted Content to aid in root-cause prior to repair at FCA Redacted Content or FCA Redacted Content U0132 (Loss of Comm) U0421 (Implausible Data) C220C (Software Supervision) C15DE-72 (Exhaust Solenoid Actuator Stuck Open) If no response in 15 minutes, proceed with repair. As per STAR Online case S1917000002: Do not replace any components. First record the DTC?s by creating and saving a vehicle scan report with WiTECH under the reports tab. Next, attempt to reset the ASCM by removing the F50 20A ASCM fuse in the Power Distribution Center. Then reinstall the fuse. Using WiTECH check for DTC?s. If U0132, U0421, U0422 DTCs are now stored, clear them. Perform a short test drive. If the codes do not return do not repair. Condition is under investigation by engineering.
90041502019-12-02. Service bulletin. FUEL SYSTEM, GASOLINE; POWER TRAIN. SEAL, Input If looking to replace stubshaft due to ATX fluid leaking, do not replace PTU seals. None of the seals from the PTU side will need to be replaced whenever the ATX stubshaft is replaced, even though V-seal (68408748A$) is in direct contact with the stubshaft, it will not avoid grease/oil leakage from transmission side. PTU V-seals are intended to act as a dust cover for stubshaft - PTU input shaft spline interface. PTU Input shaft seal (68408749A$) is intended to hold PTU oil and debris ingress; it should be replaced only if the fluid leakage is confirmed to be PTU oil and not ATX trans. fluid.

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