Service bulletin 18-055-22

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10214636
Published by NHTSA	2022-06-27
Manufacturer's number	18-055-22
Manufacturer's date	2022-05-24
NHTSA component	BACK OVER PREVENTION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, DIESEL; EXTERIOR LIGHTING; ELECTRICAL SYSTEM

NHTSA's summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module (ECM) / Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0506-00-Idle Control System RPM - Lower Than Expected. P0088 - Fuel Rail Pressure Too High - Bank 1. P0607-00 - ECU Internal Performance. P20E8-00 - Reductant Pressure Too Low. 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. P1C54-00 - SCR NOx Catalyst Missing. P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation(68RFE Only). P2463-00 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1(68RFE Only). P1451-00 - Diesel Particulate Filter System Performance(68RFE Only). P0299-00 - Turbocharger Underboost. P2706-00 - MS Solenoid Circuit (68RFE Only). P1D73-00 - AGS Performance. P061B - Internal Control Module Torque Calculation Performance. P064B-00 - PTO Control Module. The customer may also notice the following:PTO Customers: Allows E-Stop to work in any gear. PTO customers that use remote start: Prevents PTO cancellation in cab from disabling remote start. Harsh downshift clunk during exhaust brake deceleration. DEF gauge erratic when DEF level is low. Stall when putting in reverse in cold ambient temps. Engine stumble during engine warm up. Unstable idle when AC compressor cycles. Power Take Off (PTO) intermittently turns off with no DTCs. In addition the following software enhancements are included:Engine oil pressure switch modification. Oil Change Monitor Improvements For Severe Duty Operation. System Improvement for PTO operation. wiTECH Mass Air Flow (MAF) data parameter improvement.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Driver assistance, Electrical system, Fuel system, Lighting, Transmission and driveline, Automatic transmission, Backup camera, Transmission control module

Trouble codes named

P0088, P0299, P0301, P0302, P0303, P0304, P0305, P0306, P0506, P0607, P061B, P064B, P1451, P1C54, P1D73, P20E8, P242F, P2463, P2706

Vehicles listed
RAM 3500	2020
RAM 4500	2020
RAM 5500	2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
22V835000	2022-11-10. POWER TRAIN:AUTOMATIC TRANSMISSION
20V191000	2020-09-10. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
20V043000	2020-01-24. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
103289	2025-03-04. Service bulletin. CAMERA - REAR VIEW
S2208000045 REV.B	2024-12-11. Service bulletin. Backup Camera Poor Image Quality Inspection
1800824	2024-03-18. Service bulletin. Flash: Powertrain Control Module (PCM) Updates 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) have been set: P0506-00 - Idle Control System RPM - Lower Than Expected.P0607-00 - ECU Internal Performance. P20E8-00 - Reductant Pressure Too Low. 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. P0299-00 - Turbocharger Underboost. P1D73-00 - AGS Performance. P0626 - Generator Field Control Circuit High. P218F - Reductant No Flow Detected. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P0191 - Fuel Rail Pressure Sensor Circuit Performance. P0461 - Fuel Level Sensor 1 Performance. P0401 - EGR System Performance. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P061A - Level 2 Torque Performance. P061B - Internal Control Module Torque Calculation Performance. P061E - Internal Control Module Brake Signal Performance. P062C - ETC Level 2 MPH Performance. P0106 - Manifold Absolute Pressure Sensor Performance (In extreme cold ambient temperatures). P0116 - Engine Coolant Temperature Sensor Performance. P0420 - Catalyst System Efficiency Bank 1. P1507 - Crankcase Filter Restriction. P203F - Reductant Level Too Low. P226C - Turbocharger Boost Control ?A? Slow Response (In extreme cold ambient temperatures). P2579 - Turbocharger Speed Sensor Circuit. U0101 - Lost Communication with TCM. U02A3 - Lost of Communication with PM Sensor. U3017 - Control Module Timer/Clock Performance. Customers may also experience one or more of the following Power
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0821223	2024-01-08. Service bulletin. Radio Over The Air Update From S26.17 and T25.48 to T25.51 Software Version Customer may experience one or more of the following: ? Missing Side Camera and Trailer View SoftKeys. ? Ambient Light Setting inoperable. ? Radio reset (Rearview camera functions normally). ? Voice Recognition (VR) inoperable. ? Audio sources inoperable. ? Wireless CarPlayT inoperable. ? Setting preferences not saved on correct profile. ? Audio loss. This bulletin provides information regarding the latest Firmware Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from S26.17 and T25.48 to T25.51. NOTE: The National campaign for this FOTA update is estimated to be launched on September 29, 2023.
0804523	2024-01-02. Service bulletin. Radio Over The Air Updating to 34.42 Software Version ? Mobile Wi-Fi inoperative upon start up. ? Hotspot gives 9No Internet9 connection message on phone when trying to connect to a device. This bulletin provides information regarding the latest Firmware Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from 34.4 to 34.42.
1801823	2024-01-02. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customer or technician may experience the following: ? Power Take Off (PTO) disable to high engine oil temperature (DD and DP Cab Chassis only). ? Customer may complain of slow PTO idle ramp up. ? Message will appear ?Hot Oil? and exit high idle or PTO mode, when in high idle or PTO mode and running between 10-30 minutes (no load). ? High frequency exhaust noise at idle after cold start. This bulletin involves reprogramming the PCM with the latest available software.
0804023	2024-01-02. Service bulletin. Radio Over The Air R141.01.12, 139.01.53, 136.10.04 to R145.00.15 Software Version Updates Customers may experience one or more of the following: ? Intermittent Blue Screen (rear view camera still operable). ? Radio wireless connectivity Inoperative. ? Screen Lockup, Slow Response (rear view camera still operable). ? Caller cannot hear the driver and/or driver cannot hear the caller. ? Cannot switch stations after a call, lockup due to the phone remaining on the call. ? Radio displays ?Code Error? or Lockup In Accessory Mode?. ? Display shows a black screen on start up (rear view camera still operable). ? SXMT presets are lost for all profiles. ? SXMT has no volume and stuck on channel. ? Radio does not allow BUS to go to sleep. ? AndroidT auto not connecting on vehicle start up. ? When radio is in light theme mode and in audio Balance/Fade menu, it is hard to see the position icon. Black on black coloring. ? Black out on SXMT after switching Profiles. ? During connecting phone radio does not handle audio source correctly when making a phone call. ? Climate buttons out of place and move to settle in correct location. ? In the shortcuts menu pulled down from the status bar, the right side arrow is highlighted as if it can be selected. ? Presets with 9Hold to Save99 numbered above 9 have text cutoff. ? Profile edit not allowed while in movement for 9Memory Seat9. ? While switching between Driver Profiles, Phone Notification Volume pops up. ? Inconsistently SiriT assistance. ? Compass does not work. ? Wireless device echo. ? Satellite antenna error message. ? Display flickers before SXMT background displayed. ? Radio 9home9 screen background is theme 1 background when Theme 2, theme 3 or theme 4 is selected. ? Mirror dimmer button when added in shortcut widget does not work while driving. ? Missing one shortcut in the custom shortcuts widget. ? Cluster does not display incoming phone call popup when in o
S2108000015	2024-01-02. Service bulletin. Uconnect Box Require Service Message
0821223	2023-12-18. Service bulletin. Radio Over The Air Update From S26.17 and T25.48 to T25.51 Software Version Customers may experience one or more of the following: ? Missing Side Camera and Trailer View SoftKeys. ? Ambient Light Setting inoperable. ? Radio reset (Rearview camera functions normally). ? Voice Recognition (VR) inoperable. ? Audio sources inoperable. ? Wireless CarPlay® inoperable. ? Setting preferences not saved on correct profile. ? Audio loss. This bulletin supersedes Technical Service Bulletin (TSB) 08-212-23, date of issue September 01, 2023, which should be removed from your files. This is a complete revision and no asterisks have been used to highlight revisions.