{"nhtsa_id":10171419,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-02-18","date":"2020-01-13","document_id":"N192226060","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING","mfr_system":null,"summary":"Service Update. Certain vehicles may exhibit the high voltage bulkhead battery disconnect unit (BBDU) positive and/or negative contactors or relays, permanently or intermittently welded in the closed position. Contactors welded in the closed position will set DTC?s P0AA1 (positive), P0AA4 (negative), and P0C76 (hybrid). The malfunction indicator lamp (MIL) may also illuminate and vehicle may not start with this condition. Dealers will reprogram the hybrid powertrain control module.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171419-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171419-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171419","components":[{"id":"lighting","name":"Lighting","parent":null}],"codes":["P0AA1","P0AA4","P0C76"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"VOLT","year_from":2019,"year_to":2019,"match":"exact","vehicle_ids":["2019_chevrolet_volt"]}],"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":[]}