B0445 code meaning
USB Hub Fault
What B0445 means
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.
B0445 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0445
- USB stick or phone not recognised
- Socket charges but transfers no data, or vice versa
- Phone projection drops out repeatedly
Common causes of B0445
- Most likelySocket damaged or contaminated, short between pins
- PossibleCable between hub and head unit loose or chafed
- PossibleHub electronics or protection switch failed
- Less likelyConnected device or cable draws too much current
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Usb hubInfotainment module
What each part of B0445 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 45 | The exact fault in that area. |
What to do next
- Note B0445 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 B0445
What does B0445 mean?
B0445 means "USB Hub Fault". B0445 does not appear in any reachable J2012 list and is not described by a manufacturer, so its existence is unproven. It is a generic code, so it means the same on every make.
Is it safe to drive with B0445?
B0445 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0445 fail an emissions test?
B0445 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 B0445 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0445 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.