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.

• 11030024Mar 3, 2026Electrical system. SPEAKER - NONE
• 11030023Mar 3, 2026Electrical system. SPEAKER - NONE
• 11029770Feb 25, 2026Transmission and drivetrain. Service transmission/check engine warning indicator for the 850RE, 8HP50, 8HP70, 8HP75, 8HP75-PHEV transmissions that have fault codes P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
• 11029702Feb 18, 2026Body and structure. Floor Console Center Storage Bin Door Inoperable And Or Stuck Closed.
• 11028904Feb 14, 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
• 11028881Feb 14, 2026Engine, Electrical system. Flash: Powertrain Control Module (PCM) Updates **Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0300-00 - Multiple Cylinder Misfire - in Active or Stored status set during cold start catalyst heating. ● P0301-00 - Cylinder 1 Misfire - in Active or Stored status set during cold start…
• 11028894Feb 13, 2026Electrical system. Washer Fluid Warning Lamp Illuminated When Reservoir Is Full
• 11027843Jan 21, 2026Engine. D-25-17 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements
• 11027842Jan 21, 2026Engine. ID-25-14 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements
• 11027837Jan 21, 2026Engine. Water Pump & Chain Case Cover
• 11027836Jan 21, 2026Engine. Water Pump & Chain Case Cover
• 11027733Jan 13, 2026Other or unknown. CORE – HEATER
• 11027732Jan 13, 2026Other or unknown. CORE – HEATER
• 11026651Dec 10, 2025Electrical system. Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order"68" part number for New unsold units only
• 11026634Dec 10, 2025Brakes. Diagnostic Trouble Code (DTC) C0050-00-Brake System Hydraulic Leak Set After Recent Repair.
• 11026632Dec 10, 2025Brakes. Antilock Brake (ABS) Light On. Intermittent Or Implausible Wheel Speed Sensor Signal Diagnostic Trouble Codes (DTCs)
• 11026583Dec 4, 2025Electrical system. Sensor - acceleration
• 11026551Dec 1, 2025Suspension. Lower Ball Joint / Lower Control Arm Servicing Updates.
• 11025507Nov 6, 2025Other or unknown. CORE - HEATER
• 11025506Nov 6, 2025Other or unknown. CORE - HEATER
• 11025508Nov 3, 2025Brakes. ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE
• 11025044Oct 29, 2025Engine. Dealer technicians have reported failures involving camshaft cap bolts breaking within the cylinder head assembly. This can lead to damage to camshaft towers, camshafts, and other cylinder head components. In many cases, the entire long block has been replaced unnecessarily. Do NOT replace the entire long block unless absolutely necessary. Perform a thorough inspection and replace only the cylinder head assembly if…
• 11025028Oct 21, 2025Engine. Engine Oil Leak
• 11024312Oct 7, 2025Other or unknown. High Voltage Air Conditioning Refrigerant Dye
• 11024311Oct 6, 2025Wheels. Tire Pressure Monitor (TPM) Warning Lamp On Or Flashing. Sensor(s) Not Reading And Or Showing Dashes.
• 11023631Sep 24, 2025Engine. D-25-17 ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and Rocker Arm Replacements
• 11023630Sep 24, 2025Engine. ID-25-14 ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and Rocker Arm Replacements
• 11023618Sep 24, 2025Engine. Data collection required for all 2020-2026MY vehicles with 3.6L PSU engines during any of their first 3 engine oil changes. This data collection is applicable to all vehicle with engines with sales codes: ERG, ERC, EH3 and ERF. To assist with monitoring and quality improvement of the 3.6L engine, every time a vehicle comes for any of the first 3 oil changes, please use wiTECH to record the total engine idle time…
• 11023587Sep 23, 2025Electrical system. Flash: Amplifier (AMP) Diagnostic and System Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** ● B143B-12 - ANC Microphone 1-Circuit Short To Battery. ● B143C-12 - ANC Microphone 2-Circuit Short To Battery. ● B143E-12 - ANC Microphone 3-Circuit Short To Battery. ● B143F-12 - ANC…
• 11023623Sep 22, 2025Body and structure, Electrical system. Power Side Steps Reverse, Stop In Motion, And/Or Do Not Deploy Or Stow
• 11023622Sep 22, 2025Electrical system, Steering. Diagnostic Trouble Code (DTC) C221F-00, C2223-00, C221C-00, C0051-54 Present After Electric Power Steering (EPS) Replacement.
• 11023326Sep 18, 2025Body and structure. Exterior Front Lamps Condensation Clearing Procedure *Some customers may report that on occasion vehicle exterior front lamps (headlamps, fog lamps, grille lamps, logo lamps or signature lamps) assemblies are fogged with a light layer of condensation on the inside of the lenses*
• 11023321Sep 18, 2025Transmission and drivetrain. Rear Axle Vibration Shudder Or Chatter Customers may experience the following: ● A chatter, shudder, or vibration from the rear axle during turns. NOTE: This may happen more as the vehicle ages, especially if the vehicle is used extensively for towing or hauling heavy loads. The cause of the concern may be due to degradation of the rear axle fluid.
• 11023168Sep 12, 2025Suspension. Shock And Strut Diagnosis And Replacement Guidelines Leaking, noisy, or weak shocks or struts.
• 11023074Sep 2, 2025Suspension. Shock absorber – suspension & shocks - rear
• 11022012Aug 14, 2025Body and structure. Aluminum Body Panel Corrosion Repair Aluminum corrosion or bubbling along the leading edge of hood, hinges or other exterior surface areas of the hinges, doors, fenders, swing gates or liftgates.
• 11022003Aug 13, 2025Body and structure. Aluminum Body Panel Corrosion Repair Aluminum corrosion or bubbling along the leading edge of hood, hinges or other exterior surface areas of the hinges, doors, fenders, swing gates or liftgates
• 11021845Aug 7, 2025Engine. Verify Reman part number availability. Order the "R" part number for all orders: Warranty, Mopar, customer pay and service contract. Order "68" part number for New unsold units only.
• 11021825Aug 6, 2025Electrical system. Flash: Park Assist Module (PAM) Updates *Customers must experience one or more of the following:** ● **Park Assist is inoperative.** ● False braking alerts while backing up when there’s nothing behind the vehicle. This bulletin involves updating the PAM module with the latest available software.
• 11021581Aug 2, 2025Electrical system. Door speaker Inoperative or No Sound
• 11021585Jul 28, 2025Electrical system. LAMP - DOME
• 11021043Jul 26, 2025Engine. Engine Rattle Noise
• 11021039Jul 23, 2025Electrical system. Tire Pressure Monitor (TPM) Service Information. TPM Lamp On.
• 11021011Jul 22, 2025Electrical system. 115V Power Outlet LED Always On The amber LED remains continuously illuminated, regardless of whether the switch button is activated. This bulletin involves replacing the inverter switch.
• 11020858Jul 15, 2025Engine. Module - engine controller
• 11020855Jul 14, 2025Transmission and drivetrain. To inform dealers about the 850RE valve body PN: R8348504A connector: the original 16-pin connector included six pins that were not used in this application. To simplify the design, the connector has been optimized and updated to a 10-pin configuration.
• 11020847Jul 14, 2025Steering, Electrical system. Steering Repair Information Involving Toe Angle. Tie Rod And Or Electric Power Steering (EPS) Units.
• 11020767Jul 8, 2025Engine. Verify Reman part number availability. Order the "R" part number for all orders:
• 11020637Jul 4, 2025Transmission and drivetrain. 8HP75 D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment…
• 11020636Jul 4, 2025Transmission and drivetrain. 850RE D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment…

← All problems reported for the 2021 Ram 1500