{"nhtsa_id":10200124,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-08-09","date":"2021-06-01","document_id":"SB21J001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS","mfr_system":null,"summary":"An investigation of returned fuel injectors has shown that injectors are being unnecessarily replaced. We have identified a common occurrence of an illuminated Malfunction Indication Light (MIL) with DTC P0172 Fuel Trim System Rich set in the Engine Control Module (ECM). Through the analysis of returned injectors, we have determined the injectors were not the cause of this DTC setting. This DTC may be resolved by reprogramming the ECM with the revised calibration.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10200124-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10200124-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10200124","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"fuel-injector","name":"Fuel injection","parent":"fuel-system"},{"id":"software","name":"Software","parent":"electrical"}],"codes":["P0172"],"topics":[],"vehicles":[{"make":"ISUZU","model":"N-SERIES","year_from":2016,"year_to":2018,"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":[]}