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.

• 10222946Jan 1, 2022Equipment. ABS Lamp On, U0121 Lost Communication With ABS Module, Stop Start Inoperative U0037-00 LIN BUS
• 10222943Jan 1, 2022Transmission and drivetrain. No Crank, No Start, Battery Light On
• 10222930Jan 1, 2022Exterior lighting. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P0403 ? EGR Control Circuit Open, Set.
• 10222909Jan 1, 2022Lane departure. Service Axle Locker Warning Message
• 10222896Jan 1, 2022Transmission and drivetrain, Back-over prevention (rear camera). Rattle Noise From Power Top Driving Over Bumps Or Rough Road
• 10204304Nov 24, 2021Brakes. MASTER CYLINDER, Brake Prior to replacing the master cylinder please call Paul Kuehl at (248) 535-7013FCA Redacted Content. If no response in 15 minutes, proceed with repair.
• 10204405Nov 19, 2021Hybrid propulsion system, Electrical system. BEV/Hybrid - Showroom and Display Vehicle Battery Maintenance This information only bulletin discusses procedures that must be followed for BEV/Hybrid vehicles that are on display at dealership showrooms.
• 10204344Nov 19, 2021Back-over prevention (rear camera), Vehicle speed control, Body and structure. Wind Noise And Or Water Leak From Door Seal Area
• 10204333Nov 17, 2021Visibility (wipers, defrost, mirrors). Sky Slider Power Top Does Not Operate, New Power Top Motors Will Not Power Operate To Calibrate
• 10204302Nov 17, 2021Engine cooling. COVER, Engine 2021 JL / JT Engine Cover Removal - Dealer notification for removal of cover. Please note that the Aesthetic Engine Cover (05281562AC) has been removed on ALL JL/JT 3.6L Vehicle Configurations. Please note that a lack of engine cover matches engineering release. The engine cover will no longer be included on any 3.6L models of the JL/JT.
• 10204332Nov 16, 2021Air bags. Air Bag Lamp On, DTC B2761-11 B Pillar Side Impact Sensor Circuit Short
• 10204301Nov 15, 2021Engine cooling. SPRING, Valve For conern of misfire or misfire related DTCs and diagnosis leads to a broken valve spring, please replace all valve springs and contact FCA Redacted Content to FasTrak all replaced parts to QEC for further analysis. If no response in 15 minutes, proceed with repair.
• 10204330Nov 12, 2021Engine cooling. Issue is engine cover not installed from the factory.
• 10204371Nov 3, 2021Brakes, Wheels. Rear Caliper Adapter Bolts Are Loose Or Missing This bulletin includes replacing all four rear caliper adapter bolts if loose or missing. Customers may comment on one or more of the following:Click or clunk from the rear of the vehicle. A missing or loose rear brake caliper adapter boltFig. 1.Missing And Loose Caliper Adapter Bolts
• 10204320Nov 2, 2021Wheels. Front Wheel Well Splash Liner Contacting Tire
• 10219989Aug 31, 2021Fuel system. Diesel Fuel Injector Cleaning Procedure
• 10218528Aug 31, 2021Engine cooling, Fuel system. Diesel Fuel Injector Cleaning Procedure
• 10218594Aug 26, 2021Transmission and drivetrain. 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 of the following Diagnostic Trouble Code (DTC). U0402-00 - Implausible Data Received From TCM. U145D - Implausible Data Received From TCM On D-PT.
• 10218593Aug 26, 2021Electrical system, Transmission and drivetrain. Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates This bulletin involves updating the BPCM with the latest available software. Customers may experience a false Malfunction Indicator Lamp (MIL) illumination related to PHEV battery: U0111 - Lost Communication With Hybrid Battery Pack Sensor Module. P0EDD-00 - Hybrid/EV Battery Pack B Deterioration. P0CA7-00 - Hybrid/EV Battery Discharging…
• 10218592Aug 26, 2021Transmission and drivetrain. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. 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). U0293-00 - Lost Communication With Hybrid Control Module. P0732-00 - Gear 2 Shift Incorrect Ratio…
• 10218591Aug 26, 2021Electrical system. Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates This bulletin involves reprogramming the HCP and AHCP or also known as Power Inverter Module (PIM) with the latest available software. 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).
• 10218590Aug 26, 2021Electrical system. Flash: Integrated Dual Charging Module (IDCM) Enhancements This bulletin involves reprogramming the IDCM with the latest software available or replacing the IDCM if required. . Module, Integrated Dual Charging (IDCM)
• 10218589Aug 26, 2021Electrical system. Flash: Instrument Panel Cluster (IPC) Updates This bulletin involves reprogramming the IPC with the latest available software. Customers may comment on the following:Vehicle doesn't switch to EV mode. Front passenger seat belt chime may still ding approximately 20 seconds after the belt has been fastened. Battery was dead after leaving the vehicle overnight.
• 10218544Aug 26, 2021Equipment. 2021 (JL) Jeep Wrangler 4xe RRTs AND UPCOMING CSNs
• 10219982Aug 25, 2021Equipment. Radio Lockup In The Software Installation Screen After Accepting FOTA Update (Incorrect "S2008000204" indicated on published document)
• 10218521Aug 25, 2021Equipment. Radio Lockup In The Software Installation Screen After Accepting FOTA Update (Incorrect "S2008000204" indicated on published document)
• 10219976Aug 24, 2021Engine. 3.0L Ecodiesel Engine Oil Information
• 10218515Aug 24, 2021Engine cooling. 3.0L Ecodiesel Engine Oil Information
• 10218543Aug 23, 2021Equipment. 2021 (JL) Jeep Wrangler 4xe RRTs/CSNs
• 10219975Aug 21, 2021Fuel system. Customer complaint includes a Mil-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM: P0456 - EVAP System Small Leak P0455 - EVAP System Large Leak P04EC - EVAP System Large Leak - Fuel Tank Side (PHEV only) P04EE - EVAP System Very Small Leak - Fuel Tank Side (PHEV only) P0441 - EVAP Purge Flow Performance P1CEA - Boost Side EVAP Purge System Performance
• 10218514Aug 21, 2021Fuel system. Customer complaint includes a Mil-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM: P0456 - EVAP System Small Leak P0455 - EVAP System Large Leak P04EC - EVAP System Large Leak - Fuel Tank Side (PHEV only) P04EE - EVAP System Very Small Leak - Fuel Tank Side (PHEV only) P0441 - EVAP Purge Flow Performance P1CEA - Boost Side EVAP Purge System Performance
• 10218584Aug 20, 2021Engine cooling. Pentastar Upgrade Oil Fill Level after an Oil Change This bulletin involves rechecking the oil fill level after filling the engine to the correct specifications. The customer may describe that after an oil change they check their oil fill level and it is showing overfilled on the oil dipstick.
• 10218507Aug 18, 2021Equipment. Media Device Connection Guidelines For Bluetooth, Apple CarPlay, Android Auto Or USB To The Radio Head Unit
• 10218579Aug 14, 2021Electrical system, Equipment. UAQ UCQ UAV, UCX, UAX and UCV Radio Over The Air Software Version Updates This bulletin provides information regarding the latest Flash 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. Once the FOTA has been completed, the software level will be 39.6.Review the table below to determine when the FOTA is due to be release. The…
• 10219953Aug 12, 2021Back-over prevention (rear camera). Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routines for the above…
• 10218493Aug 12, 2021Engine cooling. Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routines for the above…
• 10218559Aug 6, 2021Equipment, Electrical system. UAQ and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: 39.6.The repair procedure must be followed step by step. If the radio is not updated with the correct software level at the correct time the radio can be damaged. If the radio was damaged by not following the repairprocedure the radio may need to be replaced. Customers may experience one or more…
• 10218558Aug 5, 2021Transmission and drivetrain, Air bags, Fuel system. Transmission Oil Cooler Lines Not Fully Engaged This bulletin involves visually inspecting both driver and passenger, upper and lower transmission oil cooler line quick connect attachments to the transmission and if not engaged, pushing the quick connect into the transmission until a click is heard or felt. Customers may also comment on one or more of the following: Transmission fluid leaking from under the vehicle.
• 10218554Aug 5, 2021Electrical system, Hybrid propulsion system, Air bags. Possible Water Intrusion at the P1 and P2 High Voltage (HV) Connectors This bulletin involves inspecting and if necessary replacement of the orange seal(s) for the P1&P2 electrical connectors. The customer states that vehicle will not start and has a check engine light on.The following Diagnostic Trouble Codes (DTCs) may be present:P1D72-00 - Open High Voltage Cable. P0A0A-00 - High Voltage System Interlock Circuit…
• 10219933Aug 2, 2021Visibility (wipers, defrost, mirrors). Customer indicates that the ESS functionality is not operational while using different functions of the HVAC system.
• 10218473Aug 2, 2021Visibility (wipers, defrost, mirrors). Customer indicates that the ESS functionality is not operational while using different functions of the HVAC system.
• 10230236Jul 31, 2021Transmission and drivetrain. Media Hub And Or Wireless Charging Pad Is Inoperative
• 10221650Jul 31, 2021Electrical system. Media Hub And Or Wireless Charging Pad Is Inoperative
• 10230225Jul 29, 2021Electrical system. Media Hub And Or Wireless Charging Pad Is Inoperative
• 10230224Jul 29, 2021Lane departure. Air Bag Warning Lamp On Or Wipers Stay On All The Time
• 10221639Jul 29, 2021Electrical system. Media Hub And Or Wireless Charging Pad Is Inoperative
• 10221638Jul 29, 2021Equipment. Air Bag Warning Lamp On Or Wipers Stay On All The Time
• 10230217Jul 27, 2021Electrical system. Diagnostic Trouble Code (DTC) P049B ? EGR B Insufficient Flow Detected, Additional Diagnostics.
• 10221631Jul 27, 2021Electrical system. Diagnostic Trouble Code (DTC) P049B ? EGR B Insufficient Flow Detected, Additional Diagnostics.
• 10230205Jul 21, 2021Vehicle speed control, Electrical system. Stop Start Feature Is Inoperative, MIL Lamp On, Hood Switch DTC?s

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