Vehicle speed sensor
Mack technical service bulletin FSB 386-007 for 2013-2015 Mack Gu, 2013-2015 Mack Cxu and 2013-2015 Mack Chu and others.
- Bulletin number
- FSB 386-007
- Component
- Power train: automatic transmission
- Summary
- Vehicle speed sensor. On certain mack trucks built from 5/7/2012 to 11/07/2014 with the m-drive transmission, the vehicle speed sensor (vss) may fail internally. This is due to a manufacturing defect of the sensor. This failure may cause fault codes related to road speed. This failure can cause multiple spn 84 fmi 19 faults, both active and inactive, to occur and may cause the mil light to come on in the dash.
Owners of these vehicles have filed 2 complaints in the transmission category.
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