{"vehicle":{"id":"2019_chevrolet_volt","year":2019,"make":"Chevrolet","model":"Volt"},"code":"P0AA1","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"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,"component":"EXTERIOR LIGHTING","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"},{"nhtsa_id":10168974,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-12-09","date":"2019-11-21","document_id":"PIC6375","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"This Preliminary information communicates that a program to repair the P0AA1 and P0AA4 is now available. Under specific unique conditions when the 12V battery voltage drops below a threshold, these DTCs may set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168974-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168974-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10168974"}],"url":"https://open.wenmarpro.com/makes/chevrolet/volt/2019/bulletins?code=P0AA1"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/chevrolet/volt/2019/codes/P0AA1","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}