Network, generic

U0444 Invalid Data Received From Body Control Module C

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Gateway module software level corrupts or delays forwarded messages
Software of the receiving module (e.g. trailer module) misjudges the data
Supply, ground or connector fault at body control module C

Symptoms

  • Trailer brake fault message although no trailer is connected
  • Lost-communication codes for the BCMs stored together with U0444

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–600
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

body control module cvehicle gateway

Related codes

U0143U0140U0443U0445

References: static.nhtsa.gov, en.wikipedia.org.