Network, generic

U0578 Invalid Data Received From Seat Module K

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

Ford assigns letter K to a defined seat: on the 2025 Lincoln Navigator, seat control module K (SCMK) is the rear left power seat module of the second row. Its software update SCMK-25.5.5.3 removed a short delay in seat operation and made the memory function of that seat store positions reliably. SSM 54226 adds a configuration case: second-row seats that would not slide fore and aft with B167F:11 in SCMK and/or SCML until both configuration apps were run. U0578 is set when SCMK frames arrive but contain implausible values such as seat position or switch status; U0277 is the lost-contact partner and U0579 the right-hand seat. No bulletin cites U0578. Expect a second-row seat that moves late, forgets memory positions or does not move at all.

Likely causes

Seat module K software fault (Ford remedy is a software update)

Seat module K not configured for the installed second-row seat equipment

Connector under the second-row seat loose or damaged

Symptoms

Left second-row power seat responds late or does not move fore and aft
Memory positions of that seat not saved

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–500

Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

seat control module k

Related codes

U0277 U0579 U054E

References: static.nhtsa.gov, static.nhtsa.gov.