Jeep Grand Cherokee 4XE 2023–2024 — technical service bulletin
Bulletin 08-178-25 · NHTSA communication 11018867 · issued May 30, 2025
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
4
vehicle entries
Official summary
"Motor Generator Unit (MGU) Replacement Customers **must** experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician **must** find the following Diagnostic Trouble Code (DTC) has been set: ● P1B0F-00 - Drive Motor A Position Sensor Offset Incorrect. Customers may also experience one or more of the following: ● Vehicle goes into limp home mode. ● Vehicle does not start. This bulletin involves inspecting the MGU serial number and possibly replacing the MGU as needed."
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.