U0579 code meaning
Invalid Data Received From Seat Module L
What U0579 means
Seat control module L (SCML) is Ford's right-hand counterpart to SCMK: on the 2025 Lincoln Navigator it runs the passenger-side power seat of the second row. Ford pushed SCML-25.5.5.3 over the air so that this seat keeps its memory settings consistently; the release note page itself is headed with the PCM by mistake but names seat control module L in the text. In SSM 54226, B167F:11 could sit in SCML when the second-row switch failed to move the seat, and the SCML configuration app was the fix. U0579 means frames from SCML reach other modules with implausible content; U0278 stands for missing frames, U0578 for the left seat module. No bulletin cites U0579. The right second-row seat may stop moving or lose its stored positions.
U0579 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 U0579
- Right second-row power seat does not move with its switch
- Stored seat positions on the passenger side lost
Common causes of U0579
- Most likelySeat module L software fault (fixed by an over-the-air update)
- PossibleSeat module L configuration missing or wrong for the seat equipment
- Less likelySeat module L internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat control module l
What each part of U0579 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 79 | The exact fault in that area. |
What to do next
- Note U0579 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 U0579
What does U0579 mean?
U0579 means "Invalid Data Received From Seat Module L". Seat control module L (SCML) is Ford's right-hand counterpart to SCMK: on the 2025 Lincoln Navigator it runs the passenger-side power seat of the second row. It is a generic code, so it means the same on every make.
Is it safe to drive with U0579?
U0579 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0579 fail an emissions test?
U0579 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 U0579 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0579 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.