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Service bulletins for the 2019 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.

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

By type

By component

By trouble code

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
18-012-19 REV. E2020-01-21. Service bulletin. POWER TRAIN; 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 that one or more of the following DTCs have been set: P04FC - Crankcase Ventilation System Performance. P050B - Cold Start Ignition Timing Performance. P0456 - EVAP System Small Leak. P0128 - Thermostat Rationality. The following software enhancement is included:Enable Soot Retention for vehicles equipped with Gasoline Particulate Filter (GPF). Customer or technician may also experience the following:Unable to read data information from the OBD II connector when using a generic scan tool(APAC Only).
21-026-19 REV. A2020-01-21. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following (DTC) has been set:P1614-00 - ECU Reset-Recovery Occurred. Customers may also experience excessive gear shifting above 120 kph (75 mph) at highway speeds.
90041012019-12-16. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:CLUTCH ASSEMBLY; EQUIPMENT. Clutch System Related Components For vehicles equipped with manual transmissions (sales code DEM) with a low mileage clutch failure please contact one of the following prior to repairs: Ganesh Maharajan: (248) 944-3018 or Cody Nofzinger: (248)-944-5847 If no response in 15 minutes, proceed with repair.
18-012-19 REV. D2019-12-02. 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 that one or more of the following DTCs have been set: P050B - Cold Start Ignition Timing Performance. P0456 - EVAP System Small Leak. P0128 - Thermostat Rationality. The following software enhancement is included: Enable Soot Retention for vehicles equipped with Gasoline Particulate Filter (GPF). Customer or technician may also experience the following:Unable to read data information from the OBD II connector when using a generic scan tool(APAC Only).
90041502019-12-02. Service bulletin. FUEL SYSTEM, GASOLINE; POWER TRAIN. SEAL, Input If looking to replace stubshaft due to ATX fluid leaking, do not replace PTU seals. None of the seals from the PTU side will need to be replaced whenever the ATX stubshaft is replaced, even though V-seal (68408748A$) is in direct contact with the stubshaft, it will not avoid grease/oil leakage from transmission side. PTU V-seals are intended to act as a dust cover for stubshaft - PTU input shaft spline interface. PTU Input shaft seal (68408749A$) is intended to hold PTU oil and debris ingress; it should be replaced only if the fluid leakage is confirmed to be PTU oil and not ATX trans. fluid.
18-012-19 REV. C2019-10-28. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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 that one or more of the following DTCs have been set:P050B - Cold Start Ignition Timing Performance. P0456 - EVAP System Small Leak. P0128 - Thermostat Rationality. The following software enhancement is included:Enable Soot Retention for vehicles equipped with Gasoline Particulate Filter (GPF). Customer or technician may also experience the following: Unable to read data information from the OBD II connector when using a generic scan tool(APAC Only).
18-037-19 REV. A2019-10-28. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs: P050B - Cold Start Ignition Timing Performance. P0456 - EVAP System Small Leak. P0128 - Thermostat Rationality. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition: Excessive radiator fan noise when the A/C is on MAX output. In addition, the following software enhancements are available:Electric Vacuum Pump (EVP) update. Fan noise reduction.
18-012-19 REV A2019-07-15. Service bulletin. POWER TRAIN. 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 that one or more of the following DTCs have been set:P0456 - EVAP System Small Leak. P0128 - Thermostat Rationality. The following software enhancement is included:Enable Soot Retention for vehicles equipped with Gasoline Particulate Filter (GPF).
18-045-192019-07-15. 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 the following Diagnostic Trouble Code (DTC).P249E-00 - Closed Loop Reductant Injection Control At Limit - Flow Too High.
21-021-19 REV A2019-07-15. Service bulletin. POWER TRAIN. Transfer Case Oil Leak This bulletin involves removing and replacing six of the transfer case extension housing bolts. Customers may notice a fluid leaking on the ground from the middle of vehicle.
21-026-192019-07-15. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience excessive gear shifting above 120 kph (75 mph) at highway speeds.
21-021-192019-07-15. Service bulletin. POWER TRAIN. Transfer Case Oil Leak This bulletin involves removing and replacing six of the transfer case extension housing bolts. Customers may notice a fluid leaking on the ground from the middle of vehicle.
90040852019-07-15. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY:PEDAL/HAND LEVER(MOTORCYCLE). SENSOR, Clutch Pedal Engineering is seeking information regarding P083F - Clutch Pedal Sensor A B Correlation Faults. Prior to component(s) replacement: Please Contact the following individuals: Joe Marigold (248) 701-8510 / joe.marigold@fcagroup.com Michael Lai (734) 286-0321 / michael.lai@fcagroup.com If no response in 15 minutes, proceed with repair
90040792019-07-15. Service bulletin. POWER TRAIN. PLUG/GASKET, Transmission Case For vehicles with a DEM manual transmission with a leak from the drain plug please contact Jeff Laduke at 810-422-3099. 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.