{"nhtsa_id":10018539,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2006-01-06","date":null,"document_id":"3562C","mfr_campaign":null,"replaces":"6532D","component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM","mfr_system":null,"summary":"SERVICE ENGINE SOON LIGHT DUE TO P0420 DIAGNOSTIC TROUBLE CODE ON LOW MILEAGE VEHICLES - UPDATE ECM CALIBRATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10018539","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":["P0420"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"COBALT","year_from":2006,"year_to":2006,"match":"exact","vehicle_ids":["2006_chevrolet_cobalt"]},{"make":"CHEVROLET","model":"HHR","year_from":2006,"year_to":2006,"match":"exact","vehicle_ids":["2006_chevrolet_hhr"]},{"make":"CHEVROLET","model":"MALIBU","year_from":2006,"year_to":2006,"match":"exact","vehicle_ids":["2006_chevrolet_malibu"]},{"make":"SATURN","model":"ION","year_from":2006,"year_to":2006,"match":"exact","vehicle_ids":["2006_saturn_ion"]}],"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":[]}