U0578 code meaning
Invalid Data Received From Seat Module K
What U0578 means
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.
U0578 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0578
- Left second-row power seat responds late or does not move fore and aft
- Memory positions of that seat not saved
Common causes of U0578
- Most likelySeat module K software fault (Ford remedy is a software update)
- PossibleSeat module K not configured for the installed second-row seat equipment
- Less likelyConnector under the second-row seat loose or damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat control module k
What each part of U0578 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 78 | The exact fault in that area. |
What to do next
- Note U0578 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0578
What does U0578 mean?
U0578 means "Invalid Data Received From Seat Module K". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0578?
U0578 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0578 fail an emissions test?
U0578 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0578 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0578 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.