Jeep Grand Cherokee 2019 — technical service bulletin
Bulletin 18-009-20 · NHTSA communication 10173350 · issued Feb 6, 2020
Technical service bulletin
communication type
Power Train
component
2019
model years
1
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) and Transmission Control Module (TCM) Updates This is a coordinated bulletin that involves reprogramming the PCM and TCM,at the same time, with the latest available software.Both the PCM and TCM must be up to date for these changes to be effective. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DiagnosticTrouble Code (DTC):P0456 - EVAP System Small Leak. Customers may also experience the following:Extended engine crank times. The following improvement is also inclu
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.