{"nhtsa_id":10132874,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-02","date":"2016-10-20","document_id":"S-SB-0008-16","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"TSB: Some 2012 ? 2013 model year iQ vehicles may exhibit one or more of the following conditions: * Rough idle condition. * Idle speed momentarily drops at idle. * MIL ?ON? with one or more of the following DTCs: P1603, P1604 and/or P1605. These may be caused by excessive carbon build-up on piston head. Follow the Repair Procedure in this Service Bulletin to address this condition","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10132874-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10132874-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10132874","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P1603","P1604","P1605"],"topics":[],"vehicles":[{"make":"SCION","model":"IQ","year_from":2012,"year_to":2013,"match":null,"vehicle_ids":[]}],"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":[]}