{"nhtsa_id":10184801,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-12-28","date":"2015-07-01","document_id":"AA0H0","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE","mfr_system":null,"summary":"ECU False P0421 DTC Detection. A subject vehicle may exhibit an illuminated MIL (Malfunction Indicator Lamp) with DTC (Diagnostic Trouble Code) P0421 (ATC Dtc Deterioration Monitoring). The engine ECU may falsely detect an issue with the ATC ( After Turbo Catalyst). Enhanced ECU software is available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10184801-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10184801-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10184801","components":[{"id":"engine","name":"Engine","parent":null},{"id":"engine-control-module","name":"Engine control module","parent":"engine"}],"codes":["P0421"],"topics":[],"vehicles":[{"make":"HINO","model":"CONVENTIONAL TRUCKS W/JO8","year_from":2015,"year_to":2015,"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":[]}