{"nhtsa_id":10187813,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-02","date":"2021-02-18","document_id":"21B17","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"In all of the affected vehicles, the installed high-output alternator and powertrain control module (PCM) calibration were not aligned. A mismatch between the alternator and PCM calibration could cause idle control issues such as engine speed fluctuations, which may cause customer dissatisfaction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10187813-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10187813-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10187813","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXPLORER","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_ford_explorer"]}],"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":[]}