U0444 code meaning
Invalid Data Received From Body Control Module C
What U0444 means
Body control module C is the third body controller in vehicles with distributed body electronics; U0444 records invalid content in its frames, U0143 lost contact. Ford documents the code: TSB 24-2116 covers 2023 F-150 trucks with the 3.5L PowerBoost hybrid that warn of a trailer brake fault even with no trailer hitched, while the trailer module stores U0444:82, possibly next to U0140:87 and U0143:87. Failure type 82 stands for a message counter that is wrong or not updated, 87 for a message that is missing. Ford blames the software of gateway module A, not body module C itself. The case shows that a code naming a body module can point at the network path in between, so gateway and receiver software are checked before module C is replaced.
U0444 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0444
- Trailer brake fault message although no trailer is connected
- Lost-communication codes for the BCMs stored together with U0444
Common causes of U0444
- Most likelyGateway module software level corrupts or delays forwarded messages
- PossibleSoftware of the receiving module (e.g. trailer module) misjudges the data
- Less likelySupply, ground or connector fault at body control module C
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Body control module cVehicle gateway
What each part of U0444 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 44 | The exact fault in that area. |
What to do next
- Note U0444 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 U0444
What does U0444 mean?
U0444 means "Invalid Data Received From Body Control Module C". Body control module C is the third body controller in vehicles with distributed body electronics; U0444 records invalid content in its frames, U0143 lost contact. It is a generic code, so it means the same on every make.
Is it safe to drive with U0444?
U0444 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0444 fail an emissions test?
U0444 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 U0444 to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0444 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.