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Service bulletins for the 2020 Jeep Wrangler

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.

1020 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
892162023-04-17. Service bulletin. COMMUNICATION: VEHICLE TO INFRASTRUCTURE. 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)
892112023-04-17. Service bulletin. COMMUNICATION:MANUFACTURER TELEMATICS. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification (Rev. A)
890792023-04-17. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Warranty Bulletin D-23-04 2018 - 2023 (Current) Jeep Wrangler (JL) and 2020 - 2023 (Current) Jeep Gladiator (JT) - Corrosion Warranty Claim Simplification
S20250000012023-04-17. Service bulletin. BACK OVER PREVENTION; EXTERIOR LIGHTING. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S18080001522023-04-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). CEL (Check Engine Lamp) Illuminates, Recent PCM Replace or Flash Update Performed, Diagnostic Trouble Codes (DTCs) P057B Brake Pedal Position Sensor Circuit Performance, P1572 Brake Pedal Stuck, C0042-54 Brake Pedal Missing Calibration
S23070000012023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. Customer complaint may include a coolant leak, or, a coolant leak is detected during a routine oil change inspection.
S228A0000282023-04-17. Service bulletin. ELECTRICAL SYSTEM. Radio Remained On After Ignition Is Switched Off, Dead Battery From Excessive Radio Current Draw
S14080003842023-04-17. Service bulletin. ELECTRICAL 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
S23020000012023-04-17. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); SUSPENSION. Service Air Suspension Message In Cluster. C15AD-92-Ride Height System- Performance In Below Freezing Temperatures.
S18190000042023-04-17. Service bulletin. STRUCTURE: UNDERRIDE. Shimmy Felt In Front End
91001382023-04-17. Service bulletin. POWER TRAIN. FILTER KIT, Transmission Oil For leak concerns that have been isolated to a transmission pan gasket, please replace ONLY the gasket. Pan/filter replacement are not required.
9003357a2023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY review and follow instructions from the latest STAR Online S1809000007 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. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
90033572023-04-17. Service bulletin. ENGINE AND ENGINE 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. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
91001342023-04-17. Service bulletin. ENGINE AND ENGINE 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.
08-038-232023-02-13. Service bulletin. BACK OVER PREVENTION:SOFTWARE. Radio Over The Air JR34.3 Updating to JR34.32.Software Version Customers may experience one or more of the following: Not be able to use Mobile Wi-Fi upon start up. Hotspot gives a 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 JR34.3 to JR34.32. NOTE: National launch for this FOTA update is expected to begin February 20, 2023.
08-022-232023-02-13. Service bulletin. BACK OVER PREVENTION:SOFTWARE. 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 updated from 39.5 to 40.12.
18-003-232023-02-13. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; POWER TRAIN; FUEL SYSTEM, GASOLINE; PARKING BRAKE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; BACK OVER PREVENTION. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: **P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P208B - Reductant Pump 1 Control Performance. P0300-00 - Multiple Cylinder Misfire (MIL Illuminated During 4WD-LO Only). P0301-00 - Cylinder 1 Misfire (MIL Illuminated During 4WD-LO Only). P0302-00 - Cylinder 2 Misfire (MIL Illuminated During 4WD-LO Only). P0303-00 - Cylinder 3 Misfire (MIL Illuminated During 4WD-LO Only). P0304-00 - Cylinder 4 Misfire (MIL Illuminated During 4WD-LO Only). P0305-00 - Cylinder 5 Misfire (MIL Illuminated During 4WD-LO Only). P0403-00 - EGR Control Circuit Open ? Disabled Fault.** P225D-00 - NOX Sensor 1/1 Performance Signal Stuck Low. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance Bank 1. P200B-00 - Intake Manifold Runner Performance Bank 2. P2610 - PCM Internal Engine Off Timer Performance. P0534-00 - AC Refrigerant System A Charge Loss. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P2199-00 - Intake Air Temperature Sensor 1/2 Correlation. P0087-00 - Fuel Rail Pressure Too Low (with rapid apply and release of accelerator pedal). P0306-00 - Cylinder 6 Misfire. P01CB-00 - Cylinder 1 Injection Timing Performance Over Retarded. P01CC-00 - Cylinder 1 Injection Timing Performance Over Advanced. P01CD-00 - Cylinder 2 Injection Timing Performance Over Retarded. P01CE-00 - Cylinder 2 Injection Timing Performance Over Advanced. P01CF-00 - Cylinder 3 Injection Timing Performance Over Retarded. P01D0-00 - Cylinder 3 Injection Timi
S23180000022023-02-13. Service bulletin. EXTERIOR LIGHTING. Malfunction Indicator Lamp (MIL) Illumination. Intake Manifold Runner Valve Diagnostic Trouble Codes (DTCs) Setting In Extreme Cold Ambient Temperatures.
S23230000042023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Defogger Is Not Working. Terminal Detached From The Glass.
S23230000022023-02-13. Service bulletin. EQUIPMENT:ELECTRICAL. Washer Light On And Will Not Turn Off After Adding Washer Solvent.
08214222023-01-23. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; ELECTRICAL SYSTEM. Radio Over The Air Updates to JR34.3/JR34.4 and JR34.41
03003222023-01-17. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. Front or Rear Axle Sensor Kit
S22080001422023-01-17. Service bulletin. AIR BAGS. Air Bag Warning Lamp On
S22230000542023-01-17. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. Washer Inoperative, Weak Or No Spray. Low Washer Indicator May Be Illuminated.
S2008000075RevA2023-01-17. Service bulletin. ELECTRICAL SYSTEM. No Start, Start Stop Inoperative, Cluster Message Service Start Stop System

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