U024B code meaning
Lost Communication With Seat Control Module G
What U024B means
Ford assigns seat control module G to the driver's multi-contour seat (SCMG), which runs massage and lumbar adjustment. Two Ford bulletins name U024B. TSB 19-2293, later 19-2390, covers multi-contour seats from the 2013 MKZ to 2019 F-150, Explorer, Expedition and Navigator: massage and lumbar respond only now and then from the switch or touchscreen, sometimes with B1471, U024B or U024C, because terminals fret in the SCMG and SCMH connectors; new pigtails and a rerouted harness fix it. SSM 53226 adds that on 2020–2021 F-Super Duty an SCMG software update by FDRS can misconfigure the module so the SYNC module (APIM) stores U024B; running the SCMG configuration app clears it. Expect driver massage and lumbar to drop out. The passenger unit H is U024C; invalid data from G are U054C.
U024B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U024B
- Driver seat massage and lumbar inoperative or intermittent
- Seat settings on the SYNC screen without response
- B1471 stored alongside
Common causes of U024B
- Most likelyFretting corrosion in the SCMG connector terminals under the seat
- PossibleModule misconfigured after a software update (configuration app not run)
- PossibleSeat harness strained by seat travel or poor routing
- Less likelyMulti-contour seat module 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 gVehicle bus wiring
What each part of U024B means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4B | The exact fault in that area. |
What to do next
- Note U024B 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 U024B
What does U024B mean?
U024B means "Lost Communication With Seat Control Module G". Ford assigns seat control module G to the driver's multi-contour seat (SCMG), which runs massage and lumbar adjustment. It is a generic code, so it means the same on every make.
Is it safe to drive with U024B?
U024B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U024B fail an emissions test?
U024B 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 U024B to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will U024B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.