{"nhtsa_id":10188849,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-15","date":"2021-02-17","document_id":"TSB210032-021720","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of stuck intake air heater relay and intake air heater damage which may result in Fault Code 383, intake air heater malfunctions and trouble starting the engine.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188849-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188849-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10188849","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"B6.7","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISB6.7","year_from":null,"year_to":null,"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":[]}