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Service bulletins for the 2016 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.

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

By type

By component

By trouble code

By topic

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

Bulletins, newest first
1023072025-01-06. Service bulletin. POWER TRAIN. GEAR - REACTION SUN
1023872025-01-04. Service bulletin. POWER TRAIN. SEAL - OUTPUT SHAFT
1023892025-01-04. Service bulletin. POWER TRAIN. SEAL - OUTPUT SHAFT
1012322024-11-07. Service bulletin. POWER TRAIN. Plate - Planetary
S1623000028 Rev.2023-02-13. Service bulletin. VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
1813022REVA2023-01-17. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); FUEL SYSTEM, DIESEL. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs: P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P1C54 - SCR NOx Catalyst Missing. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. P0300 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0306-00 - Cylinder 6 Misfire. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0128 - Thermostat Rationality. P218F - Reductant No Flow Detected. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). The following DTCs have been changed from a one trip fault to a two trip fault:P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low. P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High. In addition to addressing the above DTCs,
18130222023-01-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs. P0401 - EGR System Performance. P2281 - Air Leak Between MAF and Throttle Body. P0402 - Egr Flow Excessive Detected. P0234 - Turbocharger Overboost Condition. P049D - Egr Control Position Exceeded Learning Limit. P040B - Exhaust Gas Recirculation Temperature Sensor "A" Circuit Performance. P064F - Unauthorized Software/Calibration Detected. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P1C54 - SCR NOx Catalyst Missing. P229F -Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. P0300 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0306-00 - Cylinder 6 Misfire. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0128 - Thermostat Rationality. P218F - Reductant No Flow Detected. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in).
S17090000102023-01-09. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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.
1802716REVB2022-12-19. Service bulletin. EXTERIOR LIGHTING; BACK OVER PREVENTION; POWER TRAIN; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC. Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The following DTCs have been changed from a one trip fault to a two trip fault: · P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. · P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. · P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low. · P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following DTCs set in the PCM memory: · **P0128 - Thermostat Rationality Improvements.** · P2281 - Air Leak Between MAF and Throttle Body. · P218F - Reductant No Flow Detected. · P0218 - Transmission High Temperature Operation Activated (68RFE Only). · P0868 - Line Pressure Low, MIL Action (68RFE Only). · U110E - Lost Ambient Temperature Message. · P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). In addition to addressing the above DTCs, the following powertrain system improvements/enhancements are also included in this software release: · **Engine Noise Improvements. · Engine Hesitation Improvement. · Improved Engine Fuel Economy.** · Reduction in engine noise during regeneration at idle. · 68RFE Transmission Overall Shift Quality Improvements. · Test results fix for partial range misfire (68RFE Only). · Ambient Air Temperature Improvements. · Stationary Desoot with wiTECH Fix. · OBD Misfire Monitoring Improvement (68RFE Only).
18015172022-10-31. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN; FUEL SYSTEM, DIESEL; SERVICE BRAKES, HYDRAULIC; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE. Flash: 6.7L Diagnostic and System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault:P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low. P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following DTCs set in the PCM memory:P218F - Reductant No Flow Detected. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P0128 - Thermostat Rationality Improvements. P2281 - Air Leak Between MAF and Throttle Body. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). In addition to addressing the above DTCs, the following powertrain system improvements/enhancements are also included in this software release:Fuel pressure override test improvement for wiTECH. AC pressure sensor error threshold change. No crank, No start fix. Improvement to correct engine feels like low or reduced power. Engine Noise Improvements Improved Engine Fuel Economy. Reduction in engine noise during regeneration at idle. 68RFE Transmission Overall Shift Quality Improvements. Test results fix for partial range misfire (68RFE Only). Ambient Air Temperature Improvemen
90038022022-10-31. Service bulletin. POWER TRAIN. SCR Converter - Ammonia Trap If a customer comes in with a check engine light for P20EE and has led to replacing the SCR, please contact Dean Armstrong at (248)-944-5364. Cummins and FCA engineering is currently investigating the root cause to this condition. If you do not receive an answer or call back within 15 minutes, proceed with normal diagnostics
18-027-162022-10-24. Service bulletin. FUEL SYSTEM, GASOLINE; SERVICE BRAKES; POWER TRAIN. Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. **These DTCs have been changed from a one trip fault to a two trip fault: · P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF · P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low · P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High** A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · **P2281 - Air Leak Between MAF and Throttle Body. · P218F - Reductant No Flow Detected. · P0218 - Transmission High Temperature Operation Activated (68RFE Only). · P0868 - Line Pressure Low, MIL Action (68RFE Only).** · U110E - Lost Ambient Temperature Message. · P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). In addition to addressing the above DTCs, the following powertrain system improvements/enhancements are also included in this software release: · **68RFE Transmission Overall Shift Quality Improvements. · Test results fix for partial range misfire (68RFE). · Ambient Air Temperature Improvements. · Stationary Desoot with wiTECH Fix.** · OBD Misfire Monitoring Improvement (68RFE Only).
S19080001022022-10-17. Service bulletin. POWER TRAIN. (Rev. A) Power Inverter Load Ratings
1813022REVA2022-10-17. Service bulletin. POWER TRAIN; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs: P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P1C54 - SCR NOx Catalyst Missing. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. P0300 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0306-00 - Cylinder 6 Misfire. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0128 - Thermostat Rationality. P218F - Reductant No Flow Detected. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). The following DTCs have been changed from a one trip fault to a two trip fault:P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low.
18130222022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs. P0401 - EGR System Performance. P2281 - Air Leak Between MAF and Throttle Body. P0402 - Egr Flow Excessive Detected. P0234 - Turbocharger Overboost Condition. P049D - Egr Control Position Exceeded Learning Limit. P040B - Exhaust Gas Recirculation Temperature Sensor "A" Circuit Performance. P064F - Unauthorized Software/Calibration Detected. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P1C54 - SCR NOx Catalyst Missing. P229F -Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. P0300 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0306-00 - Cylinder 6 Misfire. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0128 - Thermostat Rationality. P218F - Reductant No Flow Detected. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in).
21030172022-10-17. Service bulletin. POWER TRAIN. This bulletin involves replacing the transmission assembly.
90044452022-10-17. Service bulletin. POWER TRAIN. Transfer Case Shift Lever Design Change
1810822REVA2022-09-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with updatedsoftware. 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): P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. P0456 - EVAP System Small Leak.
18108222022-09-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with updatedsoftware. The customer may describe extended cranking or starting times when the Compressed Natural Gas (CNG) tank level is low(DJ only) (Sales Code EZF only).Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation thetechnician may find one or more of the following Diagnostic Trouble Codes (DTCs): P0335 - Crankshaft Position Sensor Circuit. P2610 - PCM Internal Engine Off Timer Performance. P0456 - EVAP System Small Leak.
S18210000012022-09-26. Service bulletin. POWER TRAIN. Gear Ratio DTC?s, Transmission Shift Concerns, Does Not Shift At Times, Shudders
90040092022-09-26. Service bulletin. POWER TRAIN. Transmission Kit with Torque Converter 1. All Promaster (VF) 3.6L/62TE equipped vehicles. If the transmission bracket to the transmission case fasteners are removed during servicing, the fasteners (Part Number 06511385A$) are one-time usage. Vehicles built prior to 10/23/2015 requires Service Kit PN 68461214AA; includes Transmission Isolator PN 68264483AA, and Adaptation Bracket 68264479AA and Fastener Service Kit PN 68329056AA Vehicles built after on or after 10/23/2015 will require only the Fastener Service Kit PN 68329056AA. 2. All 3.6L/62TE equipped vehicles. If the vehicle you are repairing has a crack in the flex plate or failed pump bushing inspect and confirm that both (2) dowel pins are present in the engine block, which align the transmission center line to the crank shaft centerline and visually inspect the dowel alignment holes in the transmission case. If the holes are damaged or elongated the transmission should be replaced to prevent further damage to the transmission/flexplate or pump bushing due to the inability to properly align the engine to the transmission during the repair. 3. All 62TE equipped vehicles. If pump bushing is scored or damaged and the dowel pin alignment holes are ok, replace the pump assembly as opposed to complete transmission. 4. All 62TE equipped vehicles. If vehicle is jerking/slipping with MIL code(s) P0740 or P2764, check TCC Solenoid operation. If TCC Solenoid is ok, the codes are indicative of a torque converter failure. Replace the torque converter.
18023212022-09-26. Service bulletin. FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; POWER TRAIN; ELECTRICAL SYSTEM; BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, DIESEL. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs.P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P1C54 - SCR NOx Catalyst Missing. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P202E - (Diesel Exhaust Fluid) Reductant Injector Performance. P0300 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0306-00 - Cylinder 6 Misfire. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0401 - EGR System Performance. P0128 - Thermostat Rationality. P218F - Reductant No Flow Detected. U0001-00 - CAN C BUS. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P1451 - Diesel Particulate Filter System Performance. P229E - NOx Sensor Circuit - Bank 1 Sensor 2. P2281 - Air Leak Between MAF and Throttle Body. P0218 - Transmission High Temperature Operation Activated (68RFE Only). P0868 - Line Pressure Low, MIL Action (68RFE Only). U110E - Lost Ambient Temperature Message. P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault:P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low.
68054772A2022-09-26. Service bulletin. POWER TRAIN. Cable assembly. Power sliding backlite.
21017192022-09-15. Service bulletin. FUEL SYSTEM, GASOLINE; AIR BAGS; POWER TRAIN; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL; EXTERIOR LIGHTING; BACK OVER PREVENTION. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the followingDTC has been set:U1111-00 - Lost Odometer Message(DD, DF, and DP with Diesel Engine Only). In addition, the customer may notice one or more of the following conditions: The customer may notice a harsh 2-3 and/or 3-4 shift(2017 MY D2 with ETK 6.7L Diesel and DF2 Transmission Only). 1-2 hard shift. 3-4 flare issue fix. Trans quick learn fix(Gas Engine Only). Transmission oil temperature light illumination during high engine and tow loads. Less than desired towing performance while using cruise control. Harsh engagement while shifting from neutral to drive, neutral to reverse,or park to reverse with vehicle still in motion (rolling garage shift). Engine flare during 2-1 tip in downshift. Less than desired shift quality during 6-5 and 5-4 coasting downshifts. Delayed downshifts in Tow/Haul mode while driving down grades. Less than desired transmission shift performance when transitioning froma low traction to high traction surfaces i.e. ice covered road to clear pavement. Less than desired shift points during light pedal and Wide Open Throttle(WOT) operation or while in Tow/Haul and engine brake modes. 1-2 upshift shudder correction(Diesel engine and DF2 Transmission Only). A harsh 1-2 upshift(DF2 Transmission Only). Excessive gear shifting(DF2 Transmission Only). Harsh 2-1 downshift(DF2 Transmission Only). Delayed engagement when shifting from neutral to drive, neutral to reverse,or park to reverse (garage shifts)(DF2 Transmission Only). Audible squawk noise on 4-3 downshift(DF2 Transmission Only). Poor vehicle acceleration in first gear with vehicle fully loaded(DF2 Transmission Only). MIL illumination with no defect found forDTC P253D - PTO Sense Circuit High(DF2 Transmission Only).
18-027-162022-09-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault: · P0421 - Catalyst 1 Efficiency Below Threshold Bank 1. · P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. · P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low. · P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following DTCs set in the PCM memory: · P0128 - Thermostat Rationality Improvements. · P2281 - Air Leak Between MAF and Throttle Body. · P218F - Reductant No Flow Detected. · P0218 - Transmission High Temperature Operation Activated (68RFE Only). · P0868 - Line Pressure Low, MIL Action (68RFE Only). · U110E - Lost Ambient Temperature Message. · P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). In addition to addressing the above DTCs, the following powertrain system improvements/enhancements are also included in this software release: · Engine Noise Improvements. · Engine Hesitation Improvement. · Improved Engine Fuel Economy. · Reduction in engine noise during regeneration at idle. · 68RFE Transmission Overall Shift Quality Improvements. · Test results fix for partial range misfire (68RFE Only). · Ambient Air Temperature Improvements. · Stationary Desoot with wiTECH Fix. · OBD Misfire Monitoring Improvement (68RFE Only).

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