{"vehicle":{"id":"2021_ram_3500","year":2021,"make":"Ram","model":"3500"},"code":"U1601","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":4,"bulletins":[{"nhtsa_id":11012036,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-12-21","date":"2024-12-19","document_id":"S2008000186 REV.B","mfr_campaign":null,"component":"ENGINE","summary":"Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 – ECU Application Software Code 1 Missing Or Corrupted","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11012036-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11012036-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11012036"},{"nhtsa_id":10229492,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-09","date":"2022-08-15","document_id":"S2008000186REVA","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM","summary":"Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229492-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229492-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229492"},{"nhtsa_id":10224048,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-17","date":"2020-11-20","document_id":"S2008000186","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10224048-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10224048-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10224048"},{"nhtsa_id":10184426,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-12-21","date":"2020-11-20","document_id":"S2008000186","mfr_campaign":null,"component":"ENGINE; ELECTRICAL SYSTEM","summary":"Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10184426-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10184426-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10184426"}],"url":"https://open.wenmarpro.com/makes/ram/3500/2021/bulletins?code=U1601"},"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/ram/3500/2021/codes/U1601","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."]}