{"nhtsa_id":619511,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-06-04","date":"2001-04-01","document_id":"976","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM","mfr_system":null,"summary":"ON SOME VEHICLES THE ON-BOARD DIAGNOSTIC (OBD) SYSTEM MAY NOT DETECT A CATALYST FAILURE AS REQUIRED BY CALIFORNIA EMISSIONS REGULATION. AS A RESULT, THE OBD SYSTEM MAY NOT ILLUMINATE THE CHECK ENGINE LIGHT IF A CATALYST FAILS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/619511","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DODGE","model":"RAM PICKUP","year_from":1999,"year_to":1999,"match":"base","vehicle_ids":["1999_dodge_ram"]},{"make":"DODGE","model":"RAM VAN","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_dodge_ram-van"]},{"make":"DODGE","model":"RAM WAGON","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_dodge_ram-wagon"]}],"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":[]}