{"nhtsa_id":10190310,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-04-15","date":"2017-10-01","document_id":"17-NA-321","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","mfr_system":null,"summary":"Exhaust Smell and/or Leak with Possible Malfunction Indicator Lamp Illuminated Condition Some customers may comment on an exhaust smell and/or leak with possible malfunction indicator lamp illuminated. During diagnosis, a technician may find DTC P0430 and/or P0420. Cause This may be due to a crack around the catalytic mounting flange. Correction Replace converter assembly with new service part.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10190310-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10190310-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10190310","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"catalytic-converter","name":"Catalytic converter","parent":"exhaust-emissions"}],"codes":["P0420","P0430"],"topics":[],"vehicles":[{"make":"CADILLAC","model":"XTS","year_from":2013,"year_to":2018,"match":"exact","vehicle_ids":["2013_cadillac_xts","2014_cadillac_xts","2015_cadillac_xts","2016_cadillac_xts","2017_cadillac_xts","2018_cadillac_xts"]},{"make":"CHEVROLET","model":"IMPALA","year_from":2014,"year_to":2018,"match":"exact","vehicle_ids":["2014_chevrolet_impala","2015_chevrolet_impala","2016_chevrolet_impala","2017_chevrolet_impala","2018_chevrolet_impala"]}],"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":[]}