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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: Engine are shown. Show all

Bulletins, newest first
S1709000010 Rev.2022-07-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR. Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear (roller failure) on one or more cam lobes and that camshaft/lifter replacement is necessary.
90043452022-07-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); EQUIPMENT; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. COOLER, EGR If you are replacing the high pressure EGR cooler (p/n 68490113A$) for a suspected internal coolant leak that was detected by wetness in the EGR pipe or valve, please perform proper cooling system pressure test first to verify the leak. Refer to all published service information regarding Cooling Diagnosis and Testing (LEAK TESTING) before proceeding.
90043432022-07-18. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); EQUIPMENT ADAPTIVE/MOBILITY. VALVE, HIGH PRESSURE EGR If you are replacing the high pressure EGR valve (68490212A$) due to DTC P0407 or P0408 please refer to all published service information regarding proper diagnosis before proceeding. These DTCs are for the low pressure EGR system.
S19250000082022-06-27. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P208B ? Reductant Pump 1 Control Performance, and/or P20E8 ? Reductant Pressure Too Low, Set.
S22180000092022-06-27. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. Malfunction Indicator Lamp (MIL) Illuminated, Remote Start Disabled, Diagnostic Trouble Code (DTC) P2183 ? Engine Coolant Temperature Sensor 2 Circuit Performance set.
90044842022-06-27. Service bulletin. ENGINE AND ENGINE COOLING. Motor Generator Unit Engineering is looking to avoid unnecessary part replacements for Motor Generator Unit (MGU) underhood whining noise and P1C64 faults. When replacing the MGU for a bearing noise, connect the scan tool to the vehicle and create a scan report to include with the claim prior to replacement of the MGU. See SOL case S2208000009 for added details. Please check Service Library for available TSBs for your concern. Follow current Service Procedures for each complaint, but call Engineering before removing MGU to gather further information. Contacts: FCA Redacted Content If no response in 15 minutes, proceed with repair.
S18090000072022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Customer Complaint May Include Engine Oil Leak Or Consumption
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.
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.
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:
S21050000022021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ESC ABS MIL light on DTC?s P0507, P04FC, P2172 set
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
S1924000019 Rev.2021-03-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PRESSURE/TEMPERATURE SENSOR; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S21140000012021-03-15. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Humming/Buzzing Noise From Under The Hood With The Key Off.
18-062-20 REV. A2021-03-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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 that the one or more of the following DTCs have been set:P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. P0307 - Cylinder 7 Misfire. P0308 - Cylinder 8 Misfire. The customer may experience one or more of the following:Rough idle/misfire only after cold start ECO light does not illuminate in the cluster when Multiple Displacement System (MDS) is active(EMEA, LATAM and APAC). 2-3 kph (1.3-1.9 mph) difference between cruise set speed and the actual vehicle speed(EMEA, LATAM and APAC).
18-008-20 REV. A2021-03-01. Service bulletin. FUEL SYSTEM, GASOLINE; EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. 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. DTCs have been set:Change DTC number from P0101-00 to P0109-00 - Mass Air Flow Sensor Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance - Bank 2. P2D2D-00 - Cold Start Intake Manifold Runner Performance Bank 1. P2D2E-00 - Cold Start Intake Manifold Runner Performance Bank 2. P2199-00 - Intake Air Temperature Sensor 1 / 2 Correlation. P22FA-00 - NOX Sensor Performance - Slow Response High To Low Bank 1 Sensor 1. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P0087-00 - Fuel Rail Pressure Too Low. P0128-00 - Thermostat Rationality(additional software enhancement). P0300-00 - Multiple Cylinder Misfire(cold ambient temperature). P0301-00 - Cylinder 1 Misfire(cold ambient temperature). P0302-00 - Cylinder 2 Misfire(cold ambient temperature). P0303-00 - Cylinder 3 Misfire(cold ambient temperature). P0304-00 - Cylinder 4 Misfire(cold ambient temperature). P0305-00 - Cylinder 5 Misfire(cold ambient temperature). P0306-00 - Cylinder 6 Misfire (cold ambient temperature). P01CB-00 - Cylinder 1 Injection Timing Performance - Over Retarded. P01CC-00 - Cylinder 1 Injection Timing Performance - Over Advanced. P01CD-00 - Cylinder 2 Injection Timing Performance - Over Retarded. P01CE-00 - Cylinder 2 Injection Timing Performance - Over Advanced. P01CF-00 - Cylinder 3 Injection Timing Performance - Over Retarded. P01D0-00 - Cylinder 3 Injection Timing Performance - Over Advan
S20080001922021-03-01. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); ELECTRICAL SYSTEM. Check Engine Light (CEL) On, Electronic Stability Control (ESC) Indicator Light Illuminated, DTC?s C0042-28, P057B
08-014-212021-02-16. Service bulletin. AIR BAGS; EXTERIOR LIGHTING; BACK OVER PREVENTION; ENGINE AND ENGINE COOLING. Motor Generator Unit (MGU) Connector Not Fully Seated This bulletin involves replacing the MGU. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following Diagnostic Trouble Codes (DTCs). U0594 - Implausible Data Received From HCP. P1B03-00 - Resolver Signal / MCPA Rationality. P0A3F-00 - Drive Motor A Position Sensor 1 Circuit. P0607-00 - ECU Internal Performance. P1C64-00 - Hybrid Perf - Engine Speed Below Target During Autostart. P0A92-00 - Hybrid Generator Performance. Customers may also experience the following: The vehicle has 15-40 minutes of driving time before a vehicle stall.The vehicle will be unable to re-start. The vehicle will lose charging of the main 12V battery. A check engine light and/or a low battery light illuminates.

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