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Service bulletins for the 2014 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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
18-004-142022-08-29. Service bulletin. EXTERIOR LIGHTING; BACK OVER PREVENTION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM. Flash: Malfunction Indicator Lamp (MIL) Illumination. Includes Various Driveability Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes (DTC?s) have been set: (Further improvements over what was released in SB 18-004-14) (applies only to DD/DP vehicles) (applies only to DD/DP vehicles) P2066 - Fuel Level Sensor 2 Performance (applies only to DJ/D2 vehicles) P0441 - Evap Purge System Performance P2504 - Charging System Output High P04D0 - Cooled EGR Temperature Sensor Circuit Low P04D1 - Cooled EGR Temperature Sensor Circuit High
90030812022-08-29. Service bulletin. ELECTRICAL SYSTEM. Dielectric Grease This product is no longer approved for use on ignition coil and spark plug boots. Current plug boot material(silicone) is not compatible with this grease and can cause deterioration over time.
Z5091195A2022-08-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. RES / RHA / REB radio that supports Bluetooth and Hands-Free For issues with Bluetooth, Hands-Free Calling, and/or Voice Commands, DO NOT replace the radio. Diagnose the Hands-Free Module system (also called the Telematics Module). The Telematics Module (and associated components) is the system responsible for these features. A power cycle may be required for the hands-free module for proper diagnosis.~ Please reference; 8T - Navigation/Telecommunication Diagnosis and Testing (DIAGNOSIS AND TESTING - HANDS FREE PHONE)
18-072-162022-08-22. Service bulletin. EXTERIOR LIGHTING; STRUCTURE; POWER TRAIN; FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM. Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. The following powertrain system improvements/enhancements are included in this software release. These enhancements are listed by vehicle application. DS vehicles equipped with a 3.6L engine (Sales Code ERB). · **U0140 - Lost Communication With Body Control Module (attempting to clear this DTC will be unsuccessful). · ASD Relay Enhancements To Improve Fuel Pump Relay Initialization At Key On - (Auto Shutdown).** · Enhanced Automatic Oil Change Indicator (EAOCI) system improvements to switch to a severe duty cycle algorithm anytime the PCM is replaced to ensure the customer receives a timely oil change required message. · Corrected a generic scan tool display issue regarding Mode 6 data accuracy. DS vehicles equipped with a 5.7L engine (Sales Code EZH). · **U0140 - Lost Communication With Body Control Module (attempting to clear this · ASD Relay Enhancements To Improve Fuel Pump Relay Initialization At Key On - (Auto Shutdown).** · System improvements to prevent Malfunction Indicator Lamp (MIL) illumination with a Diagnostic Trouble Code (DTC) P0300 - Multiple Cylinder Misfire when using a block heater in ambient temperatures greater than -29°C (-20°F). · Enhanced Automatic Oil Change Indicator (EAOCI) system improvements to switch to a severe duty cycle algorithm anytime the PCM is replaced to ensure the customer receives a timely oil change required message. · Corrected a generic scan tool display issue regarding Mode 6 data accuracy. DJ, DD, and D2 vehicles equipped with a 5.7L engine (Sales Codes EZC or EZF). · U0140 - Lost Communication With Body Control Module (attempting to clear this · Transmission torque management enhancement when shifting from drive to reverse. · Software to correct Malfunction Indicator Lamp (MIL) illumination wi
08-099-142022-08-22. Service bulletin. ELECTRICAL SYSTEM; SUSPENSION; TRAILER HITCHES; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). Flash: Air Suspension Message Battery Voltage Low This Bulletin involves updating the Air Suspension Control Module (ASCM) software. false message ?Battery Voltage Low - Start Engine to Change Ride Height? which appears in the Electronic Vehicle Information Center (EVIC). This condition may happen when the vehicle is first started and trying to move the suspension from trailer ride height to normal ride height.
18-053-142022-08-22. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC. Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows: Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following DTCs. These Faults Have Been Changed From One Trip Faults To Two Trip Faults: ? P0201 - P0206 - Fuel Injector X Circuit Open Fault Codes. ? U110E - Lost Ambient Temperature Message. ? P049D - EGR Control Position Exceeding Learning Limit. ? P226C - Turgocharger Boost Control ?A? Slow Response. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: ? U1A24 - Lost Communication With Ammonia Sensor. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For: ? P0087 - Fuel Rail Pressure Too Low. ? P2281 - Air Leak Between MAF And Throttle Body. ? P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. ? P0128 - Thermostat Rationality. In cold ambient temperatures. ? P214D - SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ? P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. ? P040B - Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. ? U3017 - Control Module Timer/Clock Performance. ? U1421 - Implausible Ignition Key Off Time Received. ? P0420 - Catalyst Efficiency Below Threshold. ? P026B - Injection Timing Performance. ? P04DB - Crankcase Ventilation System Disconnected. ? P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1. ? P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance. ? P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. ? P2002 - Diesel Particulate Filter Efficiency Below Threshold. ? P0604 - Internal Control Module RAM. ? P1451 - Diesel Particulate Filter System Performance. Other Updates Included: ? Urea system cali
18-002-142022-08-22. Service bulletin. FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; POWER TRAIN. Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel.Software To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: P0201 - P0206 - Fuel Injector X Circuit/Open Fault Codes. U110E - Lost Ambient Temperature Message. P049D - EGR Control Position Exceeding Learning Limit.Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: P0087 - Fuel Rail Pressure Too Low. P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. P2281 - Air Leak Between MAF And Throttle Body. P0128 - Thermostat Rationality. In low ambient temperatures. U3017 - Control Module Timer/Clock Performance. U1421 - Implausible Ignition Key Off Time Received. P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance. P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P0604 - Internal control Module RAM Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC.Other Updates: Urea system calibration changes. Fuel Filter Minder Calibration Changes. Cruise control system improvements. Improvements in exhaust brake switch operation. Charging system improvements for dual alternator applications. Various wiTECH data and system test additions and improvements. OBD Template changes for P2453. Dual Fuel Tank component update. Inducement Timer Reset (Feature enable in wiTech). PTO Denied Status Message Update. PTO Horn Request sent to Body Control Unit (BCU.)
08110152022-08-22. Service bulletin. ELECTRICAL SYSTEM. This bulletin involves configuring the Body Control Module (BCM).
08108152022-08-22. Service bulletin. ELECTRICAL SYSTEM. This bulletin involves reprogramming the Vehicle System Interface Module (VSIM) with the
05013152022-08-22. Service bulletin. PARKING BRAKE:ELECTRICAL:CONTROL MODULE:SOFTWARE; SEAT BELTS; ELECTRICAL SYSTEM. Anti Lock Brake (ABS) Module System Enhancements.
08-008-14 REV. B2022-08-22. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE. RA2 RG2 Or RJ2 Radio Update To Prevent Display Screen Lockup This bulletin involves updating the radio's software or replacing the radio if required. A customer may experience the radio display screen is locked on the Ram logo. This software update is to prevent this condition from occurring. Vehicles equipped with satellite radio (sales code RSD) may have a condition were the radio may reset a few times during a drive cycle. This condition is very intermittent.
18-004-14 REV. A2022-08-22. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Malfunction Indicator Lamp (MIL) Illumination. Includes Various Driveability Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes (DTC?s) have been set: (Further improvements over what was released in SB 18-004-14) (applies only to DD/DP vehicles) (applies only to DD/DP vehicles) P2066 - Fuel Level Sensor 2 Performance (applies only to DJ/D2 vehicles) P0441 - Evap Purge System Performance P2504 - Charging System Output High P04D0 - Cooled EGR Temperature Sensor Circuit Low P04D1 - Cooled EGR Temperature Sensor Circuit High
08-038-142022-08-22. Service bulletin. ELECTRICAL SYSTEM. Missing: Tailgate Keyless Entry With Back-Up Camera Wiring Kit And Vehicle System Interface Module Jumper This bulletin involves placing the missing wire harnesses in the glove box for later installation. Vehicle System Interface Module (VSIM) jumper and tailgate keyless entry with back-up camera wiring kit missing from glove box.
90030812022-08-22. Service bulletin. ELECTRICAL SYSTEM. Dielectric Grease This product is no longer approved for use on ignition coil and spark plug boots. Current plug boot material(silicone) is not compatible with this grease and can cause deterioration over time.
18-096-162022-08-15. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Flash: 6.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. NOTE: **This bulletin contains optional software update that should only be used in situations where the customer is specifically complaining of a Drone Noise, Shudder, Pulsation, or Vibration under light throttle applications while vehicle is operating in MDS/ECO mode. There will be two separate software options displayed on the wiTECH flash tab. The software file released for this condition contains the verbiage ?OPTIONAL?. The other file is the standard software that does not contain improvements for the Drone/Shudder concern. If for some reason the customer finds this shudder improvement objectionable, the PCM software may be returned/reflashed to the standard version. Both software versions will address the remaining conditions noted in the bulletin. A small number of customers may experience a surge, shudder or pulsation type sensation when driving on smooth road surfaces at highway speeds of 64-129 km/h (40-80 mph).** During normal diagnostics a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) present: · **P0335 - Crankshaft Position Sensor Circuit.** · P0300 - Multiple Cylinder Misfire, cold Idle misfire (DJ,D2 or DD vehicles only). · P030X - Cylinder Misfire (any cylinder). · P04D1 - Cooled EGR Temperature Sensor Circuit High. · P04D0 - Cooled EGR Temperature Sensor Circuit Low. · P2504 - Charging System Output High. · P0441 - Evap Purge System Performance. · P2066 - Fuel Level Sensor 2 Performance. · P0401 - EGR System Performance (DJ/D2 vehicles only). · P2096 - Downstream Fuel Trim System 1 Lean (DD/DP vehicles only). · P2098 - Downstream Fuel Trim System 2 Lean (DD/DP vehicles only). ·
18-028-162022-08-15. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. NOTE: There will be a choice between 2 calibrations. One for vehicles that utilize an ammonia sensor and one for vehicles that have had the ammonia sensor removed. Be sure to select the correct software based on vehicle configuration. Prevent or reduce Malfunction Indicator Lamp (MIL) illumination when no defect is present for the following Diagnostic Trouble Codes (DTCs). These faults have been changed from a one trip fault to a two trip fault: · P0201 - P0206 - Fuel Injector X Circuit/Open Fault Codes. · P049D - Exhaust Gas Recirculation (EGR) Control Position Exceeding Learning Limit. Improvements to prevent or reduce Malfunction Indicator Lamp (MIL) illumination when no defect is present for: · **P229E - NOx Sensor Circuit - Bank 1 Sensor 2 (For non-ammonia delete systems only). · P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2 (For non-ammonia delete systems only). · P22A7 - NOx Sensor Heater Circuit Performance - Bank 1 Sensor 2 (For non-ammonia delete systems only). · U059F - Invalid Data Received From NOx Sensor "B" (For non-ammonia delete systems only). · P2459 - Diesel Particulate Filter Regeneration Too Frequent. · P218F - Reductant No Flow Detected. · P242F - Diesel Particulate Filter Restriction - Ash Accumulation.** · P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1 (For ammonia delete systems only). · P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). · P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low. · U110E - Lost Ambient Temperature Message. · U3017 - Control Module Timer/Clock Performance.
08-036-14 REV. A2022-08-15. Service bulletin. EQUIPMENT; PARKING BRAKE; BACK OVER PREVENTION; ELECTRICAL SYSTEM. RA3 RA4 Radio Enhancements This bulletin involves inspecting and updating the radio software, if required. A customer may experience, one or more of the following conditions. Navigation function may resets itself after using One-Shot Voice Recognition (VR). Intermittently the Global Positioning System (GPS) may lose it?s location for a short time and causes routing and positioning concerns. GPS and Internal cellular device may become inoperative and causes a loss of GPS and cellular functions. A false Pop-up message may appear ?Vehicle Phone Requires Service? even though the vehicle?s phone works properly. Back-up camera image may be unclear or jittery/stutters at times. Enables Via Mobile software features when released to consumers. (U.S. market only) Able to adjust audio balance / fade settings during a VR session. Correct, condition where user could not exit screen off mode. Mute button status was not being displayed correctly. Presets where not shown correctly or were deleted. Enhancements to POI. ParkSense tone continuously on. Enhancement to navigation routing. Radio display may shows ?Please insert USB Stick?. Enhancement made when video is display in radio when using PAL format video disks. Corrected the temperature slider bar not updating on Manual Temperature Control vehicles. Navigation may not start or may lose position. Rear camera may show a black screen for 3 seconds upon going to reverse. Enhancements for iPod or iPhone devices that may not start playing after connecting. iPod would not resume playing after a VR session or phone call. Radio reset, screen lockup, blank screen or sluggish system response time. Compass indicator turns off. Touch screen shut down message. Radio surround sound will not stay ON. Driver memory feature causes Sirius XM failure. Loss of radio presets. Battery drain - due to radio remains on. Uconnect apps don't load. AM/FM popping noises and/or static. Backup camera display is blank
08-021-14 REV. B2022-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; ELECTRICAL SYSTEM. RG3 RG4 RJ3 RJ4 Radio Enhancements This bulletin involves inspecting and updating the radio software, if required. ? Speed Camera UK & Spain complaining that the speed camera feature was not available with the latest MY14 software. ? DAB preset list on the top of the screen doesn't change while scrolling with steering controls. ? Rear view camera jitter. ? Tuner reception software enhancements. ? HVAC temperature control enhancements. ? SRT soft button missing for radios when vehicle is equipped with SRT feature (EMEA /LATAM markets only). ? Battery drain due to the radio and cluster back-lighting staying on. ? Postal Code smart speller logic enhancements (EMEA markets only). ? AM/FM steering wheel mode switch button not working (LATAM markets only). ? Navigation Lockout Disable while vehicle is in motion (EMEA markets only). ? Removed network status indicators for SRT/APPS. ? Voice Recognition (VR) says 'cancel' when starting (App) applications. ? iPod would not resume playing after a VR session or phone call. ? Removed the cell signal indicators in the SRT and Apps button on non-US vehicles. ? rear camera may show a black screen for 3 seconds upon going to reverse. ? Navigation would not start or would lose position. ? Removal of parental control under Apps menu. ? Turn by Turn navigation in the cluster set to ON by default. ? Transfer button does not pick-up and transfer incoming call. ? Some Russian letters are caps when they should be lower-case. ? Touch screen locks up in navigation, when Russian is selected. ? Address search availably when the vehicle is moving (EMEA markets only). ? VR messages in Spanish talks to fast. ? Recognition enhancement for Russian VR. ? Hands free audio too low for non-amp vehicle (KL). ? Intermittently ?Registration expired? pop-up appears on display screen. ? Arabic language for navigation only, not the keyboard (RJ3 RJ4 radio only). ? Incorrect time to destination, when
18-039-142022-08-15. Service bulletin. ELECTRICAL SYSTEM. PTO Feature Function Improvement Customers are not able to select Power Take Off (PTO) functionality because the option selection menu is missing from the Commercial menu (EVIC selection). This bulletin involves reconfiguring the vehicle.
18-034-14 REV. A2022-08-15. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. P0520- Engine Oil Pressure Sensor Circuit This bulletin involves replacing the oil pressure sensor with a revised part. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code (DTC) has been set: P0520 - Engine Oil Pressure Sensor Circuit
90030592022-08-08. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM. Park Assist Sensor 1) Active or Stored DTC of Signal Shape / Waveform Failure fault: B128E-25, B128F-25, B1290-25, B1291-25, B1292-25, B1293-25, B1295-25, B1296-25, B1297-25, and/or B1298-25, check for snow/mud/ice/obstruction and clean the Sensors, both front and back (behind bumper) of sensor. The snow/mud/ice can be behind the bumper, sensor retainer and/or the sensor which may cause customers to think they have an issue since they cleaned the front of the sensor/bumper, but not behind where dirt/mud/ice snow can accumulate. Once the Bumper and Sensors are completely cleaned and clear of snow, mud, ice, and/or obstruction, the sensors must activate in order for the faults to go STORED. After cleaning the Bumper and Sensors, turn off the engine, wait 10 seconds, turn on the engine and then place the vehicle in REVERSE so that the sensors activate. The faults will go STORED. 2) Active or Stored DTC code of Short to Ground fault: B128E-11, B128F-11, B1290-11, B1291-11, B1292-11, B1293-11, B1294-11, B1295-11, B1296-11, and/or B1298-11, or if you have an active or stored DTC code of Performance or Incorrect Operation fault: B128E-92, B128F-92, B1290-92, B1291-92, B1293-92, B1294-92, B1295-92, B1296-92, B1297-92, and/or B1298-92, then check the wiring behind the sensor. Specifically, ensure that the connector behind the park assist sensor is fully mounted. Ensure also, there is no dirt, corrosion, or damage in this connector behind the park assist sensor as this will also cause a Short to Ground fault. With potential wiring issues addressed, the sensors must activate in order for the faults to go STORED. After all sensors are properly connected (you will likely hear a click once the connector is fully seated on the sensor), turn off the engine, wait 10 seconds, turn on the engine and then place the vehicle in REVERSE so that the sensors activate. The faults will go STORED.
90035852022-08-08. Service bulletin. ELECTRICAL SYSTEM. Intake Grid Heater, Grid Heater Relay 2012 - 2016 6.7L Cummins engines with Intake Heater issues or DTC P2609 and P0542, please replace the Intake Heater Grid and Relay as a set. 68210071A$ (heater grid) and 05187880A$ (relay). Inspect electrical cable between the heater grid and relay for signs of possible overheating. Replace cable as necessary.
08-103-152022-08-08. Service bulletin. SEATS; STEERING; WHEELS; BACK OVER PREVENTION; PARKING BRAKE; ELECTRICAL SYSTEM. RG3 RG4 RJ3 RJ4 Radio Enhancements This bulletin involves inspecting and updating the radio software, if required. ? Duplicate song titles may be displayed in USB mode. ? Last track is displayed but next track is being played. ? SD, USB or BTSA modes may become non-functional for a given ignition cycle. ? Track names may be displayed twice in USB or SD media modes. ? Voice Recognition command ?Set Temperature? may not respond in Fahrenheit. United Kingdom (UK) Vehicle only. ? DAB (Digital Audio Broadcast) is inoperative. ? Wrong routing for addresses with a longitude between 0 and -1 degrees. ? Speed Camera UK & Spain complaining that the speed camera feature was not available with the latest MY14 software. ? DAB preset list on the top of the screen doesn't change while scrolling with steering controls. ? Rear view camera jitter. ? Tuner reception software enhancements. ? HVAC temperature control enhancements. ? SRT soft button missing for radios when vehicle is equipped with SRT feature (EMEA /LATAM markets only). ? Battery drain due to the radio and cluster back-lighting staying on. ? Postal Code smart speller logic enhancements (EMEA markets only). ? AM/FM steering wheel mode switch button not working (LATAM markets only). ? Navigation Lockout Disable while vehicle is in motion (EMEA markets only). ? Removed network status indicators for SRT/APPS. ? Voice Recognition (VR) says 'cancel' when starting (App) applications. ? iPod would not resume playing after a VR session or phone call. ? Removed the cell signal indicators in the SRT and Apps button on non-US vehicles. ? rear camera may show a black screen for 3 seconds upon going to reverse. ? Navigation would not start or would lose position. ? Removal of parental control under Apps menu. ? Turn by Turn navigation in the cluster set to ON by default. ? Transfer button does not pick-up and transfer incoming call. ? Some Russian letters are caps when they sho
90035852022-07-25. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE; ELECTRICAL SYSTEM. Intake Grid Heater, Grid Heater Relay 2012 - 2016 6.7L Cummins engines with Intake Heater issues or DTC P2609 and P0542, please replace the Intake Heater Grid and Relay as a set. 68210071A$ (heater grid) and 05187880A$ (relay). Inspect electrical cable between the heater grid and relay for signs of possible overheating. Replace cable as necessary.
18-079-152022-07-25. Service bulletin. EXTERIOR LIGHTING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. WARNING:There will be a choice between 2 calibrations. One for vehicles that utilize an ammonia sensor and one for vehicles that have had the ammonia sensor removed. Be sure to select the correct software based on vehicle configuration. Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect is Present For The Following Diagnostic Trouble Codes (DTCs). These Faults Have Been Changed From A One Trip Fault To A Two Trip Fault: P0201 - P0206 - Fuel Injector X Circuit/Open Fault Codes. P049D - EGR Control Position Exceeding Learning Limit. Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For: ? P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). ? P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low. ? U110E - Lost Ambient Temperature Message. ? U3017 - Control Module Timer/Clock Performance. ? P0087 - Fuel Rail Pressure Too Low. ? P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. ? P2281 - Air Leak Between MAF And Throttle Body. ? P0128 - Thermostat Rationality. In low ambient temperatures. ? U1421 - Implausible Ignition Key Off Time Received. ? P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance. ? P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1. ? P2002 - Diesel Particulate Filter Efficiency Below Threshold. ? P0604 - Internal control Module RAM Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC. Other Updates: ? SCR Efficiency scan tool test improvement.

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