{"nhtsa_id":602199,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-10-15","date":"1998-08-21","document_id":"182798","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM","mfr_system":null,"summary":"SUBJECT PERTAINING TO DTC $B8 AND/ OR MIL ILLUMINATION. LEAK DETECTION PUMP SW OR MECHANICAL FAULT WILL BE SEEN CAUSED BY APARTIAL VACUUM BLOCKAGE IN THE LEAK DETECTION VACUUM SUPPLY. *AK","document":null,"url":"https://open.wenmarpro.com/bulletins/602199","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":1997,"year_to":1998,"match":"exact","vehicle_ids":["1997_jeep_grand-cherokee","1998_jeep_grand-cherokee"]}],"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":[]}