{"nhtsa_id":11027236,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-01-07","date":"2025-12-23","document_id":"08-419-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Battery Pack Control Module (BPCM) Software Update Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find that the following Diagnostic Trouble Code (DTC) has been set: ● P0AD4 - Hybrid Battery Pack Air Flow System Insufficient Air Flow. Customers may experience the following: ● Poor battery performance or charging. ● The vehicle may not start This bulletin involves updating the BPCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11027236-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11027236-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11027236","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["P0AD4"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2022,"year_to":2022,"match":"exact","vehicle_ids":["2022_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2022,"year_to":2022,"match":"exact","vehicle_ids":["2022_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":[]}