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Service bulletins for the 2018 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.

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

By type

By component

By trouble code

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

Bulletins, newest first
08-094-202020-11-30. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT. Flash: Drivetrain Control Module (DTCM) Update This bulletin involves reprogramming the DTCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set::If the customer has any concerns with the transfer case or if the tech performs any repairs on the transfer case, the software must be updated.C140E - Transfer Case Motor Blocked. If DTC C140E is present, follow normal diagnostic procedures before updating the DTCM.In addition the customer may describe the following:The ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC). Transfer case shift fork tabs broken during range shift. Noisy (clunking/ratcheting) transfer case range shifts. Failure to complete transfer case range shifts. The following software enhancement is available:This update will help reduce premature transfer case failure.
18-069-20 REV. A2020-10-26. Service bulletin. POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find oneor more of the following Diagnostic Trouble Codes (DTCs):P0133-00 - O2 Sensor 1/1 Slow Response. P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. P050E-00 - Cold Start Engine Exhaust Temperature Too Low. U0402-00 - Implausible Data Received From TCM. P0299-00 - Turbocharger Underboost Condition. P0402-00 - EGR Flow Excessive Detected. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P208B-00 - Reductant Pump 1 Control Performance. P20C6-00 - Reductant Heater 4 Control Circuit Performance. P245B-00 - EGR Cooler Bypass Control Circuit Performance. In addition, customers may experience the following concern:Some vehicles may have experienced a slight engine hesitation or lag inacceleration from engine startup until the engine and exhaust warmed up. This update is intended to reduce the hesitation or lag in accelerationfrom engine startup. Other software enhancement.Ability to enable the ?Fuel System Cleaning? routine in wiTECH.
18-069-202020-09-28. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):P0133-00 - O2 Sensor 1/1 Slow Response. P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. P050E-00 - Cold Start Engine Exhaust Temperature Too Low. U0402-00 - Implausible Data Received From TCM. P0299-00 - Turbocharger Underboost Condition. P0402-00 - EGR Flow Excessive Detected. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P208B-00 - Reductant Pump 1 Control Performance. P20C6-00 - Reductant Heater 4 Control Circuit Performance. P245B-00 - EGR Cooler Bypass Control Circuit Performance. Other software enhancement.Ability to enable the ?Fuel System Cleaning? routine in wiTECH.
90037042020-08-24. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN. Transmission Oil Pan, Heater (TMU), Tube or O-ring Applies to vehicles equipped with 8 speed transmissions only; if you have a leak that appears to be at the pan the use of proper leak detection is recommended. The fluid in the 8 speeds can be detected with a black light and there are aftermarket spray on leak detection materials to help ensure that the leak is properly diagnosed and not from another location such as cooler lines, heater tubes, or case porosity. Please note that the transmission pan gasket is available for many of the 8 speed applications FCA offers. Please review the available quick connect and transfer tube parts, as replacement of the TMU may not be required. If a TOC line connection is found to be the source, the quick connect may need replacement. If the leak source is coming from the connection of the TMU to the transmission, the transfer tube may need replacement. When parts are returned to the QEC the retaining clips (snap ring) for the quick disconnect fittings are missing. (This leaves a question as to whether the clips were missing from the assembly plant, or the technician removed them in order to make line removal easier.) Please return the clips with the transmission heater and note if they were not there to begin with. For any questions regarding transmission heater, contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
90042282020-05-18. Service bulletin. POWER TRAIN. CABLE ASSY, Power Sliding Backlite For concern of power sliding backlight will not close or window binding and replacing cable, please call FCA Redacted Content and send pictures to FCA Redacted Content prior to replacing the part. If no response in 15 minutes, proceed with repair.
553092019-07-15. Service bulletin. EQUIPMENT; POWER TRAIN. Power Transfer Unit
545832019-07-15. Service bulletin. POWER TRAIN. Transmission ? With Torque Converter
90039882019-07-15. Service bulletin. POWER TRAIN. Brake Transmission Shift Interlock (BTSI) Please contact Stacey Davis at (248) 260-6078 or stacey.davis@fcagroup.com if the following scenario occurs; The T79 or U11 recall was completed where the shifter inspection was acceptable and the software flash was performed but then the customer comes back needing the BTSI bracket replaced for coming out of park without the brake or key.
68317270A2018-11-26. Service bulletin. POWER TRAIN. 2014 KL 9-Speed service transaxle with 2015 common hardware This 9-speed transaxle must be ordered thru Mopar?s Powertrain Service Center (PSC) for a specific VIN and must be installed in that vehicle or the correct calibration will not load to the Engine Control Module (ECM) and Transmission Control Module (TCM).~ This 9-speed transaxle assembly requires an update to the Engine Control Module AND the Transmission Control Module using WiTech. Failure to complete both updates will result in possible damage and/or incorrect operation of this unit.
68211004A2018-11-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. Shifter - Automatic Trans Before this part is replaced for any issue please call John Grzecki on cell (248) 379- 0969. If you do not receive a return call within 15 minutes, proceed with the repair. Please be sure to accurately record any DTCs identified with the scan tool and document them on the repair order.
68090604A2018-11-26. Service bulletin. POWER TRAIN; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). Power Transfer Unit Prior to replacing the PTU, please review the following .~ Check if the service 4WD light is intermittent by driving under heavy throttle will produce a C1494-92 DTC, if yes, please call FCA axle engineering and do not replace the PTU. Bruce Michel at cell (248) 260-8641, or Jian Zhu at cell (248) 379- 1132. If neither answers with 15 minutes then proceed with the repair. ~ If the service 4WD light lamp is on steady then replace the Power Transfer Unit.
BJA465972018-06-11. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN. Job aid - If you have a suspected TC shudder/vibration, check the Interactive Network for Service Bulletins for the vehicle you are working on. A test-drive snap shot may help you isolate the source of the issue.

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