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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
07-001-20 REV. C2020-07-27. Service bulletin. ENGINE AND ENGINE COOLING:CRITICAL FASTENERS; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
18-012-20 REV. A2020-07-27. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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 of the followingDTCs have been set: P0607 - ECU Internal Performance. P0506 - Idle Speed Performance Lower Than Expected.
18-013-20 REV. A2020-07-27. 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. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set: P0607 - ECU Internal Performance. P0506 - Idle Speed Performance Lower Than Expected
08-003-20 REV. A2020-07-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT:ELECTRICAL. Flash: Driver Assistance System Module (DASM) Enhancements This bulletin involves reprogramming the DASM with the latest software available. The customer may describe the following:Instrument Panel Cluster (IPC) warnings for the FCW informing the driver to apply the brakes. Software Enhancement (06/02/2020)? Allows customers to turn off the FCW indefinitely, rather than resetting to ?ON? at each key cycle, (Japan and South Korea only). This is an incremental change, which builds upon the 11/22/2019 changes for the symptom described below. The (11/22/2019) release provided limited system improvements to enhance the FCW system hazard detection which may reduce nuisance actions and warnings from incorrectly identified structures and hazards, which can in rare circumstances cause an unwarranted brake event.
W452020-07-27. Service bulletin. POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT; SUSPENSION:FRONT:SHOCK ABSORBER. Customer Satisfaction Notification W45 Front Axle Bracket
657102020-07-27. Service bulletin. EQUIPMENT; POWER TRAIN:CLUTCH ASSEMBLY. Safety Recall W12 JL/JT Clutch Update to Dealer Instructions for Parts Ordering
S20080000942020-07-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Uconnect Market Place APP Fatal Error Message
S20080000932020-07-27. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:WARNING; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:WARNING:LAMP. Blind Spot Or Park Assist Warnings, False Activation
S20080000752020-07-27. Service bulletin. POWER TRAIN. No Start, Start Stop Inoperative, Cluster Messages to Service Shifter or Service Start Stop System
S20080000892020-07-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SGW (Security Gateway Module) Setting DTC B235A-00 ECU In-Plant- Mode
S190800000472020-07-27. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR. Volume Uncontrollable Or Stuck On High
S20080000852020-07-27. Service bulletin. SERVICE BRAKES. ABS, ESC Lamp On, Red Brake Lamp Flashing
S20080000842020-07-27. Service bulletin. ELECTRICAL SYSTEM. Cluster Service 4WD Light On
S19080001022020-07-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Audio Mute On All Sources Except AM
S20230000322020-07-27. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Hard top quarter window cracked
S18210000062020-07-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; TIRES. Oversized Tire Calibration For Customized Jeep Wrangler, Gladiator, 2019 Ram Heavy Duty DJ, MVP Update Required, MVP Hotline
S20080000772020-07-27. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. VP2R Radio Clock Not Keeping Time
S20250000052020-07-27. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes P0407 ? EGR Sensor B Circuit Low, or P0408 ? EGR Sensor B Circuit High Set
07-001-20 REV. B2020-06-22. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; EQUIPMENT. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
08-058-202020-06-22. Service bulletin. ELECTRICAL SYSTEM. Flash: Security Gateway Module (SGW) Enhancements This bulletin involves reprogramming the SGW with the latest available software. The SGW in these vehicles was flashed with a calibration intended to be paired with a different software version.No symptoms will be observable to the customer. Diagnostic services will still work correctly (e.g. vehicle scan, DTC read, etc.). However, the vehicle security firewalls will be lacking.DTCs may be present. The technician will receive no notification indicating there is any problem with the SGW.
08-055-202020-06-22. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Flash: Body Control Module (BCM) Enhancements This bulletin involves reprogramming the BCM with the latest available software. Customer will notice that the ambient temperature display in the cluster and in the radio, is showing all dashes, with no temperature display read out.
09-007-202020-06-22. Service bulletin. ENGINE; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; EQUIPMENT. Inspect Hydraulic Belt Tensioner This bulletin involves inspecting the Julian date on the hydraulic belt tensioner for possible replacement. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set:P2BA3-00 - Starter/Generator Mechanical Performance. P0A92-00 -Hybrid Generator Performance. Customers may also experience the following:Dead battery. The accessory drive belt may be slipping or belt noise.
08-052-202020-06-22. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW. Rear Window Defroster Inoperable This bulletin involves inspecting and possibly repairing the terminal of the rear defroster circuit. Customers may comment on one or more of the following:Rear window defroster is inoperable. Wire(s) hanging from the defroster back glass.
W212020-06-22. Service bulletin. EQUIPMENT; ENGINE. Customer Satisfaction Notification U21 Serpentine Belt Tensioner
S19090000022020-06-22. Service bulletin. EQUIPMENT; ENGINE. Customer complaint may include an overfilled engine crankcase after an oil change.

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