Jeep Grand Wagoneer 2023 — technical service bulletin
Bulletin 08-221-24 · NHTSA communication 11008915 · issued Oct 11, 2024
Technical service bulletin
communication type
Engine
component
2023
model years
2
vehicle entries
Official summary
"Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2C30-00 - Ignition Coil Primary Circuit Fuse A. ● P2C31-00 - Ignition Coil Primary Circuit Fuse B. Customers may also comment on the following: ● Engine hesitates/misfires. This bulletin involves reprogramming the ISCM with the latest available software."
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.