{"nhtsa_id":11015037,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-03-05","date":"2025-02-27","document_id":"08-053-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE","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\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015037-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015037-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11015037","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":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_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":[]}