{"nhtsa_id":37980,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-02-10","date":"1994-11-01","document_id":"RCL/589","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM","mfr_system":null,"summary":"HYDROCARBON AND CARBON MONOXIDE EMISSIONS LEVLS FOR THE ABOVE LISTED MODEL VEHICLES MAY EXCEED THE LIMITS ALLOWED BY CALIFORNIA EMISSIONS STANDARDS. TO CORRECT THE CONDITION, THE PCV HARNESS, CHOKE VACUUM DIAPHRAGM, EGR VALVE AND DECEL VALVE, IF EQUIPPED, MUST BE REPLACED. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/37980","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":1990,"year_to":1990,"match":"exact","vehicle_ids":["1990_jeep_wrangler"]}],"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":[]}