Network, generic

U0277 Lost Communication With Seat Control Module K

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Ford uses seat control module K for a second-row seat: on the 2025 Lincoln Navigator, SCMK drives the power seat behind the driver, in SSM 54226 called the rear left-hand power seat module. Its update SCMK-25.5.5.3 was meant to make that seat store its memory positions reliably, and SSM 54226 deals with second-row seats stuck in their longitudinal position, B167F:11 stored in SCMK or SCML, which moved again only after the configuration apps of both modules had been run in FDRS. U0277 itself, the lost-communication code for SCMK, appears in no public bulletin. If set, the left second-row seat cannot be adjusted electrically or recall memory positions; seats in front are unaffected. U0278 is the right-hand module, U0578 invalid data from SCMK.

Likely causes

Seat harness or connector under the second-row seat strained or unplugged
SCMK not configured or software update incomplete
Seat module fuse or supply open
Seat control module K internally faulty

Symptoms

  • Left second-row power seat does not move
  • Memory positions of that seat not stored or recalled

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–800
Time0.3–2.5 h

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

Parts involved

seat control module kvehicle bus wiring

Related codes

U0278U0578U024BU0208

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