{"nhtsa_id":6090286,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-03-13","date":"1999-09-01","document_id":"6980","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"SOME VEHICLES MAY EXHIBIT THE CHECK ENGINE LIGHT ON WITH DIAGNOSTIC TROUBLE CODE PO420. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/6090286","components":[],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXPLORER","year_from":1996,"year_to":1999,"match":"exact","vehicle_ids":["1996_ford_explorer","1997_ford_explorer","1998_ford_explorer","1999_ford_explorer"]},{"make":"MERCURY","model":"MOUNTAINEER","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"MERCURY","model":"MOUNTAINEER","year_from":1997,"year_to":1999,"match":"exact","vehicle_ids":["1997_mercury_mountaineer","1998_mercury_mountaineer","1999_mercury_mountaineer"]}],"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":[]}