Code Definition

B1666 — Seat Driver Recline Motor Stalled

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B1666

B1666 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1666 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The B1666 code is set by the Driver Seat Module (DSM) when it detects that the recline motor of the driver power seat has stalled while a movement command is active. The recline motor drives the seat back pivot mechanism to adjust the angle of the seat back relative to the seat cushion. The DSM monitors motor current and run time during operation, and stores this DTC when the motor draws excessive current without producing motion or fails to reach the expected position within a calibrated time. When this code is active, the seat back may not recline or return upright, may move only partway, or...

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