2021 Ram 1500 Technical Service Bulletins

1,130 technical service bulletins (TSBs) are on record for the 2021 Ram 1500. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11038555Oct 9, 2026Air bags. After Recent Service, A Replacement Occupant Classification Module (OCM) Is Non-Responsive.
• 11038518Oct 9, 2026Air bags. After Recent Service, A Replacement Occupant Classification Module (OCM) Is Non-Responsive.
• 11038329Sep 30, 2026Transmission and drivetrain. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines (850RE Transmission Only)
• 11037347Sep 8, 2026Engine. Engine PNs: MY 24-26 WD/DT (5.7L) Code P00B is being misdiagnosed and incorrect parts are being installed causing over repair. Refer to SOL S2609000006 The IAFM Foam Engine Valley Cover (PN 53013735AB) does not provide sufficient clearance for proper routing of the MDS solenoid jumper harness (PN 05148163AE). As a result, the harness may become compressed by the foam cover.
• 11036362Aug 17, 2026Electrical system. Motor - window regulator
• 11036361Aug 17, 2026Electrical system. Motor - window regulator
• 11035992Jul 28, 2026Lane departure. Blindspot Module For concern on Blindspot Module setting U11FB-00 Lost Communication with Left Blind Spot Sensor, U11FA-00 Lost Communication with Right Blind Spot Sensor. Some vehicle(s) where the Blindspot Module was replaced had no issues found with the Blindspot Module after testing. Please verify no wiring or connector issues are present prior to module replacement.
• 11035198Jul 17, 2026Electrical system, Body and structure. Cluster Message “To Operate Tailgate Shift to Park” Vehicle is In Park
• 11035058Jul 9, 2026Transmission and drivetrain. Flash: Transmission Control Module (TCM) Updates Customers may comment on one or more of the following: SYMPTOM: ● **Harsh or slipping feeling during upshifts (1st - 5th). ● Harsh or slipping feeling during kickdown events under throttle. ● Transmission fluid odor (burnt smell).** ● During a 2 - 3 transmission upshift, the engine is hitting rev limit. ● Hesitation feel during a pedal tip in, while engine is warming…
• 11035075Jul 6, 2026Other or unknown. CORE – HEATER
• 11035074Jul 6, 2026Other or unknown. CORE – HEATER
• 11035064Jul 6, 2026Fuel system. Fuel Delivery Module Before replacing the fuel module for DTCs P0461 and P062A and other not start, long crank, fuel gauge accuracy and drivability issues, the technician should disconnect the electrical connector at the pump and perform a visual inspection of the connector for and bent, spread, or pushed out terminals. Repair any issues found. Reconnect the plug and perform a push pull push to ensure the connector…
• 11034910Jun 29, 2026Electrical system, Body and structure. Switch – headlamp
• 11034909Jun 29, 2026Electrical system, Body and structure. Switch – headlamp
• 11034908Jun 29, 2026Brakes. Spring kit - disc brake pad
• 11034385Jun 26, 2026Body and structure. Backup Camera Poor Image Quality Inspection
• 11034376Jun 25, 2026Other or unknown. Outlet - air conditioning & heater
• 11034375Jun 25, 2026Other or unknown. Outlet - air conditioning & heater
• 11034342Jun 17, 2026Fuel system. Fuel Delivery Module Before replacing the fuel module for DTCs P0461 and P062A and other not start, long crank, fuel gauge accuracy and drivability issues, the technician should disconnect the electrical connector at the pump and perform a visual inspection of the connector for and bent, spread, or pushed out terminals. Repair any issues found. Reconnect the plug and perform a push pull push to ensure the connector…
• 11034339Jun 17, 2026Other or unknown. For concerns of an inoperative A/C system (no relay activation, no compressor engagement, or no response to commands), technicians need to utilize Star Online Publication S2624000007 prior to component replacement. Failure to follow this star online publication may result in repeat repairs or misdiagnosis.
• 11034345Jun 15, 2026Engine. Check Engine Light (CEL) Illuminated with Diagnostic Trouble Code (DTC) P0106 Manifold Absolute Pressure Sensor Performance Setting In The Powertrain Control Module (PCM)
• 11033948Jun 13, 2026Body and structure. Instrument Panel Delamination Customers may comment on the following: ● Wrinkles or bubbles in the instrument panel cover Fig. 1. This bulletin involves inspecting and possibly replacing the instrument panel cover.
• 11033975Jun 12, 2026Body and structure, Electrical system. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11033953Jun 10, 2026Suspension. Shock absorber - suspension
• 11033952Jun 10, 2026Suspension. Shock absorber - suspension
• 11033961Jun 9, 2026Engine. 3-way valves are available in STAR Parts as two distinct components and must be selected correctly based on application. The High Temp 3-way valve (68309834AC) is located between the engine and the bulkhead at the rear of the engine compartment. The Low Temp 3-way valve (68448241AA) is located between the engine and the radiator at the front of the engine.
• 11033897Jun 5, 2026Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11033889Jun 4, 2026Body and structure. For Dealer awareness, HD truck, eliminate 1 of 2 M8 Joints for Sidestep bracket to Body Attachment, Bolt and rivet (06102165AA, 06511062AA) per TCR # 402632, CN 80403-T18
• 11033884Jun 3, 2026Body and structure. HANDLE - DOOR PULL and PANEL - FRONT DOOR TRIM
• 11033883Jun 3, 2026Body and structure. HANDLE - DOOR PULL and PANEL - FRONT DOOR TRIM
• 11033308May 29, 2026Electrical system, Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11032987May 20, 2026Body and structure. Grille - speaker
• 11032842May 13, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle.
• 11032824May 7, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle
• 11032647May 7, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle
• 11032831May 5, 2026Electrical system. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-Fuel Ratio Imbalance Bank 1.
• 11032654May 5, 2026Electrical system. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-Fuel Ratio Imbalance Bank 1.
• 11032344Apr 30, 2026Body and structure. Squeak Or Squawk Noise Coming From Either Side Door Of The Vehicle, It Could Be Just One Door Or More. The Noise Can Be Present In Either The Upper Or The Lower Hinge.
• 11031688Apr 22, 2026Electrical system, Body and structure. Door Latch, Handle And Ajar Additional Service Information.
• 11031461Apr 14, 2026Electrical system. WARNING: Shorting the 48V output stud to the 12V output stud can cause immediate and irreversible damage to the power pack unit. Always use insulated tools and protective stud covers when performing service operations. NOTE: A loose or high resistance ground connection may result in abnormal voltage behavior and can increase the risk of electrical component damage. Always verify ground integrity before system power…
• 11031333Apr 7, 2026Engine. Camshaft cap bolts within the cylinder head assembly may cause damage to other components. DO NOT replace entire long block when only left OR right cylinder heads need to be replaced.
• 11031241Apr 1, 2026Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11030229Mar 21, 2026Engine. Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) ● P0071-00 - Ambient Air Temperature Sensor Performance. (In Active or Stored…
• 11030269Mar 18, 2026Other or unknown. Backup Camera Poor Image Quality Inspection
• 11030128Mar 12, 2026Electrical system. Instrument Panel Delamination Customers may comment on the following: SYMPTOM: ● Wrinkles or bubbles in the instrument panel cover Fig. 1. This bulletin replacing the instrument panel cover. NOTE: Only vehicles still under the basic warranty are covered in this TSB.
• 11030138Mar 9, 2026Transmission and drivetrain. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75-PHEV, 8HP75-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
• 11030042Mar 5, 2026Electrical system. Active Diagnostic Trouble Code (DTC) B1A10-00, B1A11-00, B1A12- 00, B1A13-00-, B1A14-00, B1A15-00, B1A16-00, and B1A17-00 in The Radio Frequency Hub (RFH)
• 11030035Mar 4, 2026Electrical system. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
• 11030026Mar 3, 2026Electrical system. SPEAKER - NONE
• 11030025Mar 3, 2026Electrical system. SPEAKER - NONE

← All problems reported for the 2021 Ram 1500