B0445USB Hub Fault
- Generic OBD-II code · Body
- How the car detects it
- 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.
- What you may notice
- USB stick or phone not recognised
- Socket charges but transfers no data, or vice versa
- Phone projection drops out repeatedly
- Likely causes
- LikelySocket damaged or contaminated, short between pins
- PossibleCable between hub and head unit loose or chafed
- PossibleHub electronics or protection switch failed
- RareConnected device or cable draws too much current
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.