Body, generic

B0445 USB Hub Fault

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0445 does not appear in any reachable J2012 list and is not described by a manufacturer, so its existence is unproven. A USB hub in the car splits one host port of the head unit across several sockets for media and charging. Because a loose cable can touch battery voltage, TI's TPD3S714-Q1 shields the bus supply and both data lines against shorts up to 18 V in hubs and head units, and the TPS254900A-Q1 turns its switch off quickly on such a short so that the upstream converter and the hub data lines survive. TI's charging-port overview bundles power conversion, USB-PD and this protection for media hubs. A hub fault leaves sockets without data or charge, or lets a phone connect only now and then. Bus faults of the head unit itself are separate U codes.

Likely causes

Socket damaged or contaminated, short between pins
Cable between hub and head unit loose or chafed
Hub electronics or protection switch failed
Connected device or cable draws too much current

Symptoms

  • USB stick or phone not recognised
  • Socket charges but transfers no data, or vice versa
  • Phone projection drops out repeatedly

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–400
Time0.3–1.5 h

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

Parts involved

usb hubinfotainment module

Related codes

B0420B0440

References: ti.com, ti.com, ti.com.