{"vehicle":{"id":"2003_ford_expedition","year":2003,"make":"Ford","model":"Expedition"},"code":"C1991","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":3,"bulletins":[{"nhtsa_id":10013083,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-04-07","date":"2002-10-01","document_id":"16336","mfr_campaign":null,"component":"SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE","summary":"DIAGNOSTICS FOR DIAGNOSTIC TROUBLE CODE C1991 IN THE ABS (ANTILOCK BRAKE SYSTEM) MODULE - OMITTED FROM WORKSHOP MANUAL - PROCEDURE PROVIDED. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10013083"},{"nhtsa_id":10003727,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-10-29","date":"2003-07-07","document_id":"03132","mfr_campaign":null,"component":"SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM","summary":"THIS ARTICLE ADDRESSES THE PROPER PROCEDURE TO CLEAR DIAGNOSTIC TROUBLE CODES C1990 OR C1991 FROM THE VEHICLE DYNAMICS MODULE/4-WHEEL AIR SUSPENSION MODULE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10003727"},{"nhtsa_id":636271,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-11-07","date":"2002-07-01","document_id":"16075","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"DIAGNOSTIC PROCEDURES FOR DIAGNOSTIC TROUBLE CODE C1991 (MODULE CALIBRATION FAILURE) OMITTED FROM THE WORSHOP MANUAL. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/636271"}],"url":"https://open.wenmarpro.com/makes/ford/expedition/2003/bulletins?code=C1991"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/ford/expedition/2003/codes/C1991","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}