{"nhtsa_id":620146,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-07-19","date":"2001-01-05","document_id":"4317","mfr_campaign":null,"replaces":"4317","component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"SOME CUSTOMERS MAY COMMENT OF POOR SHIFT QUALITY OR FAULT MESSAGES. QUALITY UPGRADE SOFTWARE HAS BEEN DEVELOPED FOR THE AUTOMATIC TRANSMISSION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620146","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"VOLVO","model":"S80","year_from":null,"year_to":null,"match":"exact","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":[]}