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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

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
754902022-05-31. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING. CAMSHAFT - INTAKE
752672022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS; ENGINE AND ENGINE COOLING:COOLING SYSTEM. TUBE - TURBO WATER FEED
752272022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; ENGINE AND ENGINE COOLING. MUFFLER AND TAILPIPE ? EXHAUST
08072222022-05-31. Service bulletin. LATCHES/LOCKS/LINKAGES:HOOD:LATCH; ENGINE AND ENGINE COOLING:COOLING SYSTEM. Race Cool Down Feature Inoperative This bulletin involves installing a hood latch, adding a hood latch switch jumper harness and a Body Control Module (BCM) Reconfiguration. Customers may experience: The ?Race Cool Down? feature does not work.One of the inputs the vehicle looks at for this feature to work properly, is the hood closed status. If the vehicle was built without remote start, the hood latch will not have a close switch in the latch. No Diagnostic Trouble Codes (DTCs) will set for this issue.
Emissions Recall2022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Emissions Recall Y81 Diesel Exhaust Fluid Inducement
S22090000022022-05-31. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE. Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. When performing diagnosis, an internal engine concern may be suspected.
90044442021-12-13. Service bulletin. ENGINE AND ENGINE COOLING. SPRING, Valve For conern of misfire or misfire related DTCs and diagnosis leads to a broken valve spring, please replace all valve springs and contact FCA Redacted Content to FasTrak all replaced parts to QEC for further analysis. If no response in 15 minutes, proceed with repair.
09-005-212021-06-28. Service bulletin. ENGINE. 6.2L Engine Oil Temperature Sensor Leak This bulletin involves re-torquing the oil temperature sensor to the provided specification. Customers may notice a slight oil leak from under the vehicle near the oil temperature sensor location
09-004-212021-06-28. Service bulletin. ENGINE. Oil Control Valve Connector Not Seated This bulletin involves inspecting the oil control valve connector and possibly seating the connector. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: P0013 - Bank 1 Camshaft 2 Position Actuator Circuit Open.
S21180000092021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. Customer complains of a MIL-on condition. Upon further inspection, there is a Diagnostic Trouble Code (DTC) P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) set in the PCM.
S1809000007 Rev.2021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. Customer Complaint May Include Engine Oil Leak Or Consumption
08-067-212021-05-24. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; WHEELS; STEERING; POWER TRAIN; EXTERIOR LIGHTING; AIR BAGS. Flash: Drivetrain Control Module (DTCM) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. The technician may find one or more of the following DTCs:U1440 - Implausible Transfer Case Ratio High Received. U0403-00 - Implausible Data Received From T-case. C1403-92 - Transfer Case Range Position Sensor-Performance Or Incorrect Operation(2019-2020 Vehicles Only). If only DTC C1403 is present, follow normal diagnostic procedures before updatingthe DTCM.In addition the customer may describe one or more of the following:Traction Control System light is illuminated. A driveline bump can be heard/felt occasionally when the driver is steady on the throttle at about 20-30% on a flat road while in 4WDAUTO(2019-2020 Vehicles Only). An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle(2019-2020 Vehicles Only). An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering(2019-2020 Vehicles Only). A ?Service 4WD? message/fault without commanding a transfer case shift(2019-2020 Vehicles Only).If only the ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC) and no other symptom/conditionsare present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). The blinking of the ?4WD Low? and ?4WD High? indicator lights at the same time, on the transfer case selector switch.If both 4WD indicator lights on the transfer case selector switch are blinking and no other symptom/conditions are present,follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift(2019-2020 Vehicles Only).
S1924000019 Rev.2021-05-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PRESSURE/TEMPERATURE SENSOR. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S21080000882021-05-24. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. CEL (Check Engine Lamp) On, DTC P023B Charge Air Cooler Coolant Pump Control Circuit Low, U02A9 Lost Communication With Charge Air Cooler Coolant Pump
S1809000007 Rev.2021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. Customer complaint may include engine oil leak/consumption.
S21180000022021-04-26. Service bulletin. ENGINE. Customer complaint may include a Mil-on condition that may be accompanied by a ?misfire? feel or rough-running engine condition. Upon further investigation, any of the following DTCs may be found in the PCM:
S21080000762021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. CEL Check Engine Lamp On, DTC P00F9 Supercharger-Turbocharger Outlet Pressure Sensor Range Performance
S21050000022021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ESC ABS MIL light on DTC?s P0507, P04FC, P2172 set
S21080000622021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. Rumbling, Rough Engine Vibration 1600 to1800, CEL (Check Engine Lamp) On, Cylinder Misfire DTC?s
90033572021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) All vehicles equipped with a 3.2L or 3.6L except for model year 2014 vehicles with leak concern: 1) Ensure the Oil Filter Adapter (OFA) Cap O-ring is seated in the proper groove in the cap and not damaged or cut. 2) If replacing the (OFA) due to a leak detected between (OFA) and block. Ensure the torque on the 5 bolts are torqued to 12nm. If not record the actual values, torque to 12nm and contact the FCA employees listed below. 3) Remove the (OFA) and replace the O-ring and gaskets only (Kit #68191356A$), NOT THE OFA. 4) If oil was drained, add oil dye to ensure the leak is repaired. For model year 2014 vehicles replace the Oil Filter Adaptor. 5) When replacing PN's 68310865A$ & 68308741A$, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
90043552021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ENGINE, Complete If you are replacing the 3.0L Diesel engine assembly due to internal failure, the Diesel Engineering team is requesting more information regarding the repair. Please provide the following information to FCA Redacted Content and proceed with engine order. -Vehicle VIN -Vehicle Mileage -Symptoms and reason for engine replacement -STAR case # (if applicable) Someone from the Diesel Engineering team may respond back with further questions, requests for pictures, or provide a Fast track number if the symptomatic engine needs further analysis.
S2008000126 Rev.2021-03-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE AND ENGINE COOLING. RKE Has Reduced Range, Remote Start Inoperative, Multiple Keyless Go Push Attempts To Start, Key Not Detected Message
S21140000012021-03-15. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Humming/Buzzing Noise From Under The Hood With The Key Off.
09-013-20 REV. A2021-03-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS; ENGINE. 3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following:Rough running engine.
09-013-202021-03-01. Service bulletin. ENGINE; EQUIPMENT; ELECTRICAL SYSTEM. 3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following: Rough running engine.

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