{"nhtsa_id":10163629,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-08-08","date":"2019-07-03","document_id":"SC-19-82","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"A software error was causing a false state of charge calculation, shutting off the DC to DC converter, causing the low voltage batteries to lose charge. Loss of power to the low voltage battery could cause ancillary systems in the vehicle to turn off. Proterra issued this service bulletin to update the software that will make SOC calculations more accurate and prevent loss of power to the low voltage system.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163629-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163629-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10163629","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PROTERRA","model":"CATALYST","year_from":2017,"year_to":2019,"match":null,"vehicle_ids":[]}],"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":[]}