Network, generic

U0446 Invalid Data Received From Body Control Module E

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0446 refers to body control module E, the last letter in the series that starts with U0431 for module A. It is logged by a receiving controller when module E is present on the bus but delivers values or protection fields that cannot be trusted; if E stops sending, U0145 is stored instead. No manufacturer documents U0446 publicly. A body control module in general reads switches and drives comfort and lighting loads, so a fifth unit would handle only a narrow share of these. Before replacing any part, check whether other modules report E as well, compare software levels and inspect power, ground and the network branch leading to it. If only a single receiver complains, its own software is the more likely culprit, as Ford found for body module C on the 2023 F-150 (TSB 24-2116).

Likely causes

Software of the single reporting module misreads the data of module E
Fault in the network branch or connector leading to module E
Low supply voltage or poor ground at body control module E

Symptoms

  • Individual body or comfort functions inoperative
  • Code present in one or several receiving modules

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€40–600
Time0.3–2 h

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

Parts involved

body control module ecan bus wiring

Related codes

U0145U0445U0431

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