2021 Jeep Wrangler Technical Service Bulletins

1,039 technical service bulletins (TSBs) are on record for the 2021 Jeep Wrangler. 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.

• 10247974Feb 15, 2023Equipment. International Warranty Bulletin ID-23-03 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification (Rev. A)
• 10247972Feb 15, 2023Equipment. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification (Rev. A)
• 10247953Feb 15, 2023Electrical system. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
• 10234447Feb 15, 2023Other or unknown. International Warranty Bulletin ID-23-03 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification (Rev. A)
• 10234445Feb 15, 2023Other or unknown. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification (Rev. A)
• 10234424Feb 15, 2023Electrical system. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
• 10247905Feb 14, 2023Back-over prevention (rear camera). ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY (with mileage above 30,000) review and follow instructions from STAR Online S1809000007 REV. C available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring…
• 10234420Feb 14, 2023Electrical 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
• 10234378Feb 14, 2023Engine cooling. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY (with mileage above 30,000) review and follow instructions from STAR Online S1809000007 REV. C available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring…
• 10247903Feb 13, 2023Brakes, Fuel system, Back-over prevention (rear camera). Engine When replacing a GMET4 long block from a 2021 JL or older, you will need to carry over the injector wiring harness from the original engine, and the Fuel pressure sensor should be replaced with part number: 68212572AB.
• 10234376Feb 13, 2023Engine cooling. Engine When replacing a GMET4 long block from a 2021 JL or older, you will need to carry over the injector wiring harness from the original engine, and the Fuel pressure sensor should be replaced with part number: 68212572AB.
• 10248015Feb 10, 2023Exterior lighting, Electrical system, Transmission and drivetrain, Back-over…. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: ? P1A21-00 - HV Battery Contactor Control Sequence Incorrect. ? P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. ? P0607-00 - ECU Internal Performance. ? P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. ? P0AA4-00…
• 10248013Feb 10, 2023Exterior lighting, Transmission and drivetrain, Electrical system. Flash: Integrated Dual Charging Module (IDCM) Enhancements Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTCs have been set: ? **B22A9-16 - ECU Internal Performance-Circuit Voltage Below Threshold. ? B22A9-17 - ECU Internal Performance-Circuit Voltage Above Threshold. ? B22A9-19 - ECU Internal Performance-Overcurrent.** ?…
• 10234488Feb 10, 2023Exterior lighting, Back-over prevention (rear camera), Electrical system…. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: ? P1A21-00 - HV Battery Contactor Control Sequence Incorrect. ? P0B3E-00 - Hybrid/EV Battery Voltage Sense 1 Circuit High. ? P0607-00 - ECU Internal Performance. ? P1E1B-00 - Hybrid/EV Battery Side Voltage System Isolation. ? P0AA4-00…
• 10234486Feb 10, 2023Transmission and drivetrain, Exterior lighting, Electrical system. Flash: Integrated Dual Charging Module (IDCM) Enhancements Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTCs have been set: ? **B22A9-16 - ECU Internal Performance-Circuit Voltage Below Threshold. ? B22A9-17 - ECU Internal Performance-Circuit Voltage Above Threshold. ? B22A9-19 - ECU Internal Performance-Overcurrent.** ?…
• 10248006Feb 8, 2023Vehicle speed control. Corrosion on Door, Hood And/or Swing Gate Hinges Corrosion found on the door, hood and/or swing gate hinge(s). This bulletin involves inspecting and replacing any hinge exhibiting corrosion. The replacement hinge is equipped with a Zinc shim (Fig. 1) .Zinc Shim
• 10247970Feb 8, 2023Equipment. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification
• 10247942Feb 8, 2023Visibility (wipers, defrost, mirrors). Rear Wiper Does Not Turn On
• 10234479Feb 8, 2023Vehicle speed control. Corrosion on Door, Hood And/or Swing Gate Hinges Corrosion found on the door, hood and/or swing gate hinge(s). This bulletin involves inspecting and replacing any hinge exhibiting corrosion. The replacement hinge is equipped with a Zinc shim (Fig. 1) .Zinc Shim
• 10234443Feb 8, 2023Equipment. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification
• 10234414Feb 6, 2023Suspension, Electronic stability control. Service Air Suspension Message In Cluster. C15AD-92-Ride Height System- Performance In Below Freezing Temperatures.
• 10247995Feb 3, 2023Body 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.
• 10234468Feb 3, 2023Body 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.
• 10247935Feb 2, 2023Body and structure. Shimmy Felt In Front End
• 10234408Feb 2, 2023Body and structure. Shimmy Felt In Front End
• 10247984Feb 1, 2023Vehicle speed control. Corrosion on Door hood Swing Gate Hinges Corrosion found on the door, hood and/or swing gate hinge(s). This bulletin involves inspecting and replacing any hinge exhibiting corrosion. The replacement hinge is equipped with a Zinc shim. (Fig. 1) .Zinc Shim
• 10234457Feb 1, 2023Vehicle speed control. Corrosion on Door hood Swing Gate Hinges Corrosion found on the door, hood and/or swing gate hinge(s). This bulletin involves inspecting and replacing any hinge exhibiting corrosion. The replacement hinge is equipped with a Zinc shim. (Fig. 1) .Zinc Shim
• 10234450Feb 1, 2023Engine cooling. Customer Satisfaction Notification ZD8 Coolant Leak
• 10231804Jan 26, 2023Electrical system, Transmission and drivetrain, Exterior lighting. 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 Code (DTC). U0402-00 - Implausible Data Received From TCM. U145D - Implausible Data Received From TCM On D-PT. Customers may experience one or more of the following: Vehicle may not be able to enter…
• 10231801Jan 26, 2023Electrical system, Back-over prevention (rear camera), Transmission and…. Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) 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). P061B-00 - Internal Control Module Torque Calculation Performance. NOTE: P061B-00 DTC may set after driving on snow/ice in 2WD and Traction…
• 10231792Jan 24, 2023Back-over prevention (rear camera). Radio Over The Air Updating to 40.12 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…
• 10231738Jan 24, 2023Exterior lighting. Malfunction Indicator Lamp (MIL) Illumination. Intake Manifold Runner Valve Diagnostic Trouble Codes (DTCs) Setting In Extreme Cold Ambient Temperatures.
• 10231727Jan 14, 2023Electrical system. When Performing The HCP/AHCP Combo Flash, The AHCP Portion May Fail
• 10231685Jan 12, 2023Engine cooling. Battery Heater If you are looking for the Electronic Coolant Heater (ECH) for DTC P0E15 please order the latest level part number 68443445A$.
• 10231714Jan 7, 2023Visibility (wipers, defrost, mirrors). Defogger Is Not Working. Terminal Detached From The Glass.
• 10231711Jan 6, 2023Equipment. Washer Light On And Will Not Turn Off After Adding Washer Solvent.
• 10231684Jan 6, 2023Engine cooling, Fuel system. Valve - Coolant JL PHEV Hoses to 3-Way valve coolant hoses misroute causes P0E80-00. Check hose routing as outlined in Star Online Publication S2208000205 or on a known good vehicle before replacing valve. Routing hoses correctly will likely fix the issue.
• 10229823Dec 23, 2022Electrical system, Exterior lighting, Transmission and drivetrain. 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 Code (DTC). ? U0402-00 - Implausible Data Received From TCM. ? U145D - Implausible Data Received From TCM On D-PT. **Customers may experience one or more of the following: ? Vehicle may not be able…
• 10229771Dec 23, 2022Engine cooling. Three Way Coolant Valve Hoses Misrouted. P0E80-00-Coolant Bypass Valve "B" Control Stuck Closed
• 10229767Dec 21, 2022Electrical system, Engine cooling. P0E15-00 Hybrid/Ev Battery Pack Coolant Heater "A" Control Performance Active After High Voltage (HV) Module Updates
• 10229764Dec 20, 2022Electrical system. Avoid Failure Of High Voltage Battery Pack When Performing Flashes
• 10229816Dec 16, 2022Back-over prevention (rear camera), Steering, Equipment. UAQ and UCQ Radio Enhancements Customers may experience one or more of the following: ? **Wi-Fi hotspot connection failure. ? Speaker popping, crackle noise during Voice Recognition (VR) response and navigation guidance. ? Mobile Station Integrated Services Digital Network (MSISDN) missing from radio, no connected services working.** ? Intermittent, black radio display screen (Rear View Camera (RVC) not affected)…
• 10229711Dec 16, 2022Electrical system. Integrated Dual Charging Module Before replacing the IDCM part please follow the appropriate service procedure for DTC P0D27, ensure to clear the codes and perform a charging test. If the codes come back again, proceed with the replacement.
• 10229810Dec 15, 2022Body 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. NOTE: Digital imaging pre authorization is required for Smart Warranty Base dealers or Pre Approval is required from Regional Office depending on market.
• 10230543Nov 29, 2022Electrical system, Transmission and drivetrain. Powertrain Control Module (PCM) Updates
• 10230405Nov 10, 2022Electrical system. Telematic box module 2
• 10230407Nov 4, 2022Exterior lighting. Base Headlamp Bright, Base Headlamp Black
• 10243094Nov 1, 2022Engine cooling. The coolant inlet tube fasteners on about 90,811 of the above vehicles may become loose and allow a coolant weep that may propagate into a drip. Loss of coolant can cause the engine to overheat and, if not addressed, can lead to engine failure.
• 10227763Oct 28, 2022Visibility (wipers, defrost, mirrors). Sky One Power Top Rattle This bulletin involves checking the torque values on the Sky One-Touch power top screws andreplacing all 16 screws if one is found with an incorrect torque value. Customers may experience the following: A rattle noise over bumps and rough roads while driving coming from the roof area.
• 10227722Oct 27, 2022Electrical system. Battery Warning Lamp On, Battery Charging Voltage Fluctuates

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