Ford F-250 SD 2017 — technical service bulletin
Bulletin SSM 46455 · NHTSA communication 10100027 · issued Mar 14, 2017
Technical service bulletin
communication type
Equipment
component
2017
model years
6
vehicle entries
Official summary
Some 2017 f-super duty vehicles equipped with electronic shift on the fly (esof) four wheel drive may exhibit a 4x4 indicator illuminated with dtc p1839 in the tccm. This may be caused by a backed out or loose pin for circuit ccf07 bn-gn at c1010 which is located by the driver side fender. Before attempting diagnosis or repairs, inspect pin 16 in connector c1010. If no concern is found, refer to workshop manual (wsm), section 308-07 for normal diagnostics.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.