{"nhtsa_id":11014719,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-03-04","date":"2025-02-28","document_id":"08-054-25","mfr_campaign":null,"replaces":null,"component":"ENGINE; ELECTRICAL SYSTEM","mfr_system":"Ignition System Control Module","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. ● P0300-00 - Multiple Cylinder Misfire. ● P0301-00 - Cylinder 1 Misfire Detected. ● P0302-00 - Cylinder 2 Misfire Detected. ● P0303-00 - Cylinder 3 Misfire Detected. ● P0304-00 - Cylinder 4 Misfire Detected. ● P0305-00 - Cylinder 5 Misfire Detected. ● P0306-00 - Cylinder 6 Misfire Detected. ● P0420-00 - Catalyst System Efficiency Below Threshold Bank 1. ● P0430-00 - Catalyst System Efficiency Below Threshold Bank 2. Customers may also comment on the following: ● Engine hesitates/misfires. This bulletin involves updating the ISCM with the latest available software This bulletin involves inspecting and possibly reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11014719-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11014719-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11014719","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":["P0300","P0301","P0302","P0303","P0304","P0305","P0306","P0420","P0430","P2C30","P2C31"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_jeep_wagoneer"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}