{"nhtsa_id":10171483,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-02-18","date":"2020-01-01","document_id":"B120419","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"DME FAULT MEMORY ENTRY FOR THE CRANKSHAFT SENSOR: This Service Information Bulletin (Revision 1) replaces SI B12 04 19 dated February 2019. Technicians may notice this fault logged during a diagnostic session: Fault code: Control module: Fault Text: 160021 DME Crankshaft sensor: general loss of synchronism Environmental conditions are vehicle speed 0 (stationary) and engine speed less than 1500 rpm. There is no customer-facing symptom nor related check control message displayed. Phantom/pseudo fault due to unsuitable DME software. Background: After parking the vehicle and turning off the engine both DME control units go into sleep mode at different times. The DME of cylinder bank 2 (\"secondary\") goes into sleep mode first The DME of cylinder bank 1 (\"primary\") is still awake and can experience a reduction in signal voltage for the crankshaft sensor signal This signal change can mistakenly be evaluated as a skipped crankshaft sensor cog by the DME. If the engine is started while the primary DME is still awake this causes a brief loss of synchronization with the secondary DME. Fault 160021 is logged after three (3) consecutive engine starts with this momentary loss of synchronization. Note: Starting the engine after the primary DME has also gone into sleep mode will avoid the loss of synchronization.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171483-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171483-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171483","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"530E","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_bmw_530e","2019_bmw_530e","2020_bmw_530e"]},{"make":"BMW","model":"530I","year_from":2017,"year_to":2020,"match":"exact","vehicle_ids":["2017_bmw_530i","2018_bmw_530i","2019_bmw_530i","2020_bmw_530i"]},{"make":"BMW","model":"540D","year_from":2018,"year_to":2019,"match":"exact","vehicle_ids":["2018_bmw_540d","2019_bmw_540d"]},{"make":"BMW","model":"540D","year_from":2020,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"540I","year_from":2017,"year_to":2020,"match":"exact","vehicle_ids":["2017_bmw_540i","2018_bmw_540i","2019_bmw_540i","2020_bmw_540i"]},{"make":"BMW","model":"740E","year_from":2017,"year_to":2019,"match":"exact","vehicle_ids":["2017_bmw_740e","2018_bmw_740e","2019_bmw_740e"]},{"make":"BMW","model":"740I","year_from":2017,"year_to":2020,"match":"exact","vehicle_ids":["2017_bmw_740i","2018_bmw_740i","2019_bmw_740i","2020_bmw_740i"]},{"make":"BMW","model":"740LI","year_from":2016,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"745E","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_bmw_745e"]},{"make":"BMW","model":"750I","year_from":2018,"year_to":2019,"match":"exact","vehicle_ids":["2018_bmw_750i","2019_bmw_750i"]},{"make":"BMW","model":"750LI","year_from":2016,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"840I","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_bmw_840i"]},{"make":"BMW","model":"B7 ALPINA","year_from":2018,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"C 400 X","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"F800 R","year_from":2017,"year_to":2017,"match":"exact","vehicle_ids":["2017_bmw_f-800-r"]},{"make":"BMW","model":"M5","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_bmw_m5","2019_bmw_m5","2020_bmw_m5"]},{"make":"BMW","model":"M550I","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"M550I","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_bmw_m550i","2019_bmw_m550i","2020_bmw_m550i"]},{"make":"BMW","model":"M760I","year_from":2017,"year_to":2020,"match":"exact","vehicle_ids":["2017_bmw_m760i","2018_bmw_m760i","2019_bmw_m760i","2020_bmw_m760i"]},{"make":"BMW","model":"M8","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_bmw_m8"]},{"make":"BMW","model":"M8 GRAN COUPE","year_from":2020,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"M850I","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"M850I","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_bmw_m850i"]},{"make":"BMW","model":"M850XI","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"X5","year_from":2019,"year_to":2020,"match":"exact","vehicle_ids":["2019_bmw_x5","2020_bmw_x5"]},{"make":"BMW","model":"X6","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_bmw_x6"]}],"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":[]}