{"nhtsa_id":10017210,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-10-28","date":null,"document_id":"3316","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"DIAGNOSTIC TROUBLE CODE P0420 MAY SET ON LOW MILEAGE VEHICLES, OR SHORTLY AFTER CATALYTIC CONVERTER REPLACEMENT. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10017210","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["P0420"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"COBALT","year_from":2005,"year_to":2005,"match":"exact","vehicle_ids":["2005_chevrolet_cobalt"]}],"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":[]}