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Service bulletins for the 2021 Ram 1500

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.

1129 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
ReferenceY40A2024-03-18. Service bulletin. ELECTRICAL SYSTEM. Revised Customer Satisfaction Notification Y40 ? Control Module Software Updates
ReferenceY402024-03-18. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. Customer Satisfaction Notification Y40 Control Module Software Updates
S14080003842024-03-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 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
08252232024-01-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; UNKNOWN OR OTHER. Radio Over The Air Update to LR34.31 to LR35.41 Software Version Customers may experience one or more of the following: ? Mobile Wi-Fi inoperative upon start up. ? Hotspot gives "No Internet" 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 LR34.31 to LR35.41. NOTE: The National launch for this FOTA update campaign is expected to begin December 04, 2023.
08245232024-01-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; UNKNOWN OR OTHER; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Over The Air Update to Q339.3 to QR39.62 Software Version Customers may experience one or more of the following: ? Mobile Wi-Fi inoperative upon start up. ? Hotspot gives "No Internet" 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 Q339.3 to QR39.62. NOTE: The National launch for this FOTA update campaign is expected to begin December 04, 2023.
S23080001502024-01-16. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:IGNITION. No Start, No Crank
91002742024-01-16. Service bulletin. ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SOFTWARE. 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. Prior to replacing the Blindspot Module, Please Contact Engineering: FCA REDACTED CONTENT If no response in 15 minutes, please proceed with repair.
S22080000112024-01-08. Service bulletin. ELECTRICAL SYSTEM. Wireless Qi Charger Not Charging
91002262024-01-08. Service bulletin. ELECTRICAL SYSTEM. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
91002122024-01-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. PUMP Water For 2016-2024MY 3.6L Pentastar Upgrade with suspected coolant leak. PRIOR TO PERFORMING ANY WATER PUMP REPLACEMENT, PROCEED WITH INSPECTION INSTRUCTIONS FROM THE LATEST VERSION OF STAR ONLINE PUBLICATION S2307000002. Please submit pictures of the leak area thru the DIDI process outlined in the STAR Online document. NOTE: Some coolant residue may be found at the water pump weep hole plug area which may be normal, but coolant should not be dripping from this location. If unsure about, use the Pressurized Coolant System Inspection process as found in the Dealer Connect Cooling Diagnosis and Testing Procedures.
18016232024-01-02. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM; EXTERIOR LIGHTING; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs:P0335 - Crankshaft Position Sensor Circuit. P0339 - Crankshaft Position Sensor Intermittent. Other software enhancement included with this update: Idle stability improvements during Electronic Stability Control (ESC) events.
S228A0000282024-01-02. Service bulletin. ELECTRICAL SYSTEM. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
91002622023-12-18. Service bulletin. ELECTRICAL SYSTEM. SWITCH Headlamp Before replacing the Headlamp Switch, due to an issue on the I/P Dimmer. Please follow the next steps to corroborate if the Headlamp Switch is malfunctioning: 1.- Please disconnect and reconnect the headlamp Switch. And verify if the issue is corrected. 2.- Review the resistance value between Pins 6 & 3. The value should be around 5.74 KOhms, when in the lowest position to 311 ohms in the top position (Parade Detent). If a problem is found in the resistor values. Please replace the Switch.
91002262023-10-30. Service bulletin. ELECTRICAL SYSTEM:WIRING. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
91002122023-10-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP. PUMP Water For 2016-2024MY 3.6L Pentastar Upgrade with suspected coolant leak. PRIOR TO PERFORMING ANY WATER PUMP REPLACEMENT, PROCEED WITH INSPECTION INSTRUCTIONS FROM THE LATEST VERSION OF STAR ONLINE PUBLICATION S2307000002. Please submit pictures of the leak area thru the DIDI process outlined in the STAR Online document. NOTE: Some coolant residue may be found at the water pump weep hole plug area which may be normal, but coolant should not be dripping from this location. If unsure about, use the Pressurized Coolant System Inspection process as found in the Dealer Connect Cooling Diagnosis and Testing Procedures.
18086232023-10-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software.
08181232023-09-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Over The Air Updating to QR40.12 Software Version ? Mobile Wi-Fi inoperative upon start up. ? Hotspot gives "No Internet" 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 QR39.62 and QR39.57 to QR40.12. NOTE: National launch for this FOTA update is expected to begin August 16, 2023
S238A0000342023-09-25. Service bulletin. ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS:ACCESORY POWER OUTLET/JACK/PORT/USB/SAE/CIGARETTE LIGHTER. USB Hub In-Operable
ReferenceZD72023-08-21. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Customer Satisfaction Notification ZD7 - Radio Software Update
BulletinA2023-07-31. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Customer Satisfaction Notification ZD7 - Radio Software Update
08129232023-07-31. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; UNKNOWN OR OTHER. Radio Over The Air Updating from PR39.92 to PR40.12 Software Version ? Radio Wi-Fi Hotspot connection not working. 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 PR39.92 to PR40.12. NOTE: National launch for this FOTA update is expected to begin June 23, 2023.
S23250000042023-05-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Malfunction Indicator Lamp (MIL) Illuminated. Diagnostic Trouble Code (DTC) P2047 ? Reductant Injector 1/1 Circuit, Set.
S22080000802023-05-30. Service bulletin. ELECTRICAL SYSTEM. Ambient Air Temperature Missing, Malfunction Indicator Lamp (MIL) Lamp On, Diagnostic Trouble Code (DTC) P0070-15 Ambient Air Temperature Sensor Circuit-Circuit Short to Battery or Open, P0073 Ambient Air Temperature Sensor Circuit High
S22230000632023-05-30. Service bulletin. ELECTRICAL SYSTEM. Ambient Temperature Sensor Servicing.
91001612023-05-30. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS. Parking Assist For any of the following concerns: (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) WARNING (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) INOP (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) SERVICE (PARK SENSOR or Park Assist or Park Sense or PARKING SENSOR) DOES NOT OPERATE PROPERLY Please contact FCA Redacted Content prior to part replacement. If no response in 15 minutes, proceed with repair.

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