{"nhtsa_id":620144,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-07-19","date":"2001-02-27","document_id":"2829","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL","mfr_system":null,"summary":"SUBJECT REGARDING MASS AIR FLOW SENSOR REPLACEMENT. WHEN REPLACING A MASS AIR FLOW SENSOR (MAF), ESPECIALLY WHEN DIAGNOSTIC TROUBLE CODES HAVE BEEN LOGGED IN MEMORY, IT IS IMPORTANT TO RESET THE ENGINE MANAGEMENT CONTROL UNIT (ECM) ADAPTIVE VALUES. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620144","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"VOLVO","model":"S80","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_volvo_s80"]},{"make":"VOLVO","model":"V70","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_volvo_v70"]},{"make":"VOLVO","model":"VOLVO","year_from":1999,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"VOLVO","model":"X70","year_from":null,"year_to":null,"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":[]}