{"nhtsa_id":11028229,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-04","date":"2026-01-31","document_id":"08-035-26","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. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **P0B28-00 - Hybrid/EV Battery \"B\" Voltage Unstable.** ● P0DAB-00 - Hybrid/EV Cell Balancing Performance. ● P0607-00 - ECU Internal Performance. ● P0AA1-00 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed. ● P0AA4-00 - Hybrid Battery Negative Contactor Circuit 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 Failied. ● P0BBE-00 - Hybrid/EV Battery Pack Voltage Variation. **Customers may also comment on the following: ● Vehicle does not start. NOTE: The no start condition is accompanied with one or more of the following DTCs: P0DAB-00, P0607-00, P0AA1-00, P0AA4-00, P0C78-00, P0CA6-00, P0B24-00, P1C5E-00 and/or P0BBE-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.** , new LOP, new Diagnosis statement and new Repair Procedure. Other changes not asterisked include the removal of a build date. This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 25-113, date of issue June 25, 2025. All applicable RSU VINs have been loaded. To verify this RSU service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/Service Library. All repairs are reimbursable within the provisions of warranty. B08 FSAR-TSB-6896 -2- REPAIR SUMMARY: **This bulletin involves reprogramming the BPCM with the latest available software.**","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028229-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028229-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028229","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":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_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":[]}