U024C code meaning
Lost Communication With Seat Control Module H
What U024C means
Seat control module H is Ford's passenger multi-contour seat module (SCMH), the mirror of the driver unit G. It shares the fretting connector problem of TSB 19-2293: on the listed Ford and Lincoln vehicles passenger massage and lumbar act up, sometimes with U024C stored, and the repair replaces the SCMH connector and reroutes the harness. In SSM 53226 the APIM of 2020–2021 F-Super Duty sets U024C when the SCMH was misconfigured during an FDRS update, and Ford wants the SCMH configuration app run after the SCMG one. A related Lincoln case shows the limit of the code: on 2022 Explorer and Aviator intermittent passenger massage came from SCMG/SCMH configuration with no code at all (SSM 50591). So a missing U024C does not clear the module. Passenger massage or lumbar then fail. Driver unit G is U024B; data errors from H are U054D.
U024C 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 U024C
- Passenger seat massage or lumbar inoperative or intermittent
- Passenger seat functions unavailable on the SYNC screen
Common causes of U024C
- Most likelyFretting corrosion in the SCMH connector terminals
- PossibleSCMH misconfigured after a software update
- PossiblePassenger seat harness strained by seat movement
- Less likelyPassenger multi-contour 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 hVehicle bus wiring
What each part of U024C means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4C | The exact fault in that area. |
What to do next
- Note U024C 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 U024C
What does U024C mean?
U024C means "Lost Communication With Seat Control Module H". Seat control module H is Ford's passenger multi-contour seat module (SCMH), the mirror of the driver unit G. It is a generic code, so it means the same on every make.
Is it safe to drive with U024C?
U024C does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U024C fail an emissions test?
U024C 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 U024C to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will U024C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.