Jeep Grand Cherokee 2023 — technical service bulletin
Bulletin 1400723 · NHTSA communication 10243246 · issued Aug 11, 2023
Technical service bulletin
communication type
Fuel System, Gasoline
component
2023
model years
1
vehicle entries
Official summary
Fuel Tank Filler Tube Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC has been set: ? P0456 - EVAP System Small Leak. This bulletin involves inspecting and if necessary replacing the fuel filler tube.
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.