{"nhtsa_id":11028757,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-12","date":"2026-02-04","document_id":"08-039-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Battery Pack Control Module (BPCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0B28-00 - Hybrid/EV Battery “B” Voltage Unstable. ● P0BBE-00 - Hybrid/EV Battery Pack Voltage Variation. ● P0AA1-00 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed. ● P0C78-00 - Hybrid/EV Battery System Precharge Time Too Long. ● P0CA6-00 - Hybrid/EV Battery Charging Current High. ● P0B24-00 - Hybrid/EV Battery \"A\" Voltage Unstable. ● P1C5E-00 - Hybrid/EV Battery State Of Health Failed. ● P0DAB-00 - Hybrid/EV Cell Balancing Performance. ● P0607-00 - ECU Internal Performance. Customers may also comment on the following: ● Vehicle does not start. NOTE: The no start condition is accompanied with the following DTCs: P0DAB-00, P0607-00, P0AA1-00, P0AA4-00, P0C78-00, P0CA6-00, P0B24-00 and/or P1C5E-00. P0B28-00 will result in a MIL for 49 days. After 49 days of the MIL, the vehicle will no longer be allowed to start. This bulletin involves reprogramming the BPCM with the latest available software. NOTE: Additional module flashes are required for this update to be effective, the following modules","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028757-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028757-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028757","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["P0607","P0AA1","P0AA4","P0B24","P0B28","P0BBE","P0C78","P0CA6","P0DAB","P1C5E"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER 4XE","year_from":2023,"year_to":2023,"match":"base","vehicle_ids":["2023_jeep_wrangler"]}],"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":[]}