{"nhtsa_id":10146626,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-05","date":"2017-04-01","document_id":"B110717","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"?FAULT 118002 - MIXTURE TOO RICH SETS DURING WINTER WITH COLD AMBIENT TEMPERATURES . The Service Engine Soon (MIL) light is on with the following fault stored in the DME. Fault: 118002 - Mixture too rich In the situation being described, the fault is primarily stored during the cold winter months along with the use of winter fuel. Various other causes for a rich mixture fault are possible and should not be overlooked. CAUSE DME software diagnostic is too sensitive This situation is most likely to occur if the driving profile is one of frequent cold engine starts and/or primarily short distance trips (idle / low load operation) where full engine operating temperature is not reached. Due to the lower engine oil temperatures crankcase vapors that contain a higher fuel content are not completely drawn off via the crankcase ventilation system. A false DME adaptation routine could then lead to this fault being set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10146626-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10146626-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10146626","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"X1","year_from":2016,"year_to":2017,"match":"exact","vehicle_ids":["2016_bmw_x1","2017_bmw_x1"]},{"make":"BMW","model":"X1 SAV","year_from":2016,"year_to":2017,"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":[]}