{"nhtsa_id":10199223,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-08-04","date":"2021-07-07","document_id":"Dealer 24GW","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE","mfr_system":null,"summary":"In the event of a catalytic converter failure, which could negatively impact tailpipe emissions, existing diagnostics may not properly illuminate the Malfunction Indicator Light (MIL) due to an error identified with Rear O2 Sensor monitoring.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10199223-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10199223-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10199223","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"catalytic-converter","name":"Catalytic converter","parent":"exhaust-emissions"},{"id":"engine-control-module","name":"Engine control module","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"VOLKSWAGEN","model":"GTI","year_from":2021,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"VOLKSWAGEN","model":"JETTA","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_volkswagen_jetta"]}],"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":[]}