U014B code meaning
Lost Communication With Hybrid/EV Battery Inductive Charging Module
What U014B means
U014B covers the vehicle-side controller of a wireless charging system. Inductive charging transfers energy without a plug, through a coil in a ground pad and a receiving coil under the car; the SAE J2954 standard, finalised in 2020, defines power classes of 3.7, 7.7 and 11 kW and relies on resonant coupling with about 85 percent efficiency. The module on board rectifies the received power, checks alignment and reports to the battery and charge controllers; if its messages stop, those controllers log U014B. No manufacturer documents the code publicly, and wireless charging is still rare in series production. The practical effect is that wireless charging does not start or is interrupted, while charging by cable and driving normally continue. U044C covers invalid data from this module.
U014B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U014B
- Wireless charging does not start or stops
- Charging warning message, cable charging still works
- Module not reachable with a scan tool
Common causes of U014B
- Most likelySupply, fuse or ground of the inductive charging module missing
- PossibleWiring or connector to the underbody receiver damaged by water, salt or impact
- Less likelySoftware of module and charge controller not matching
- Less likelyInductive charging module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Inductive charging moduleCAN bus
What each part of U014B means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4B | The exact fault in that area. |
What to do next
- Note U014B 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 U014B
What does U014B mean?
U014B means "Lost Communication With Hybrid/EV Battery Inductive Charging Module". U014B covers the vehicle-side controller of a wireless charging system. It is a generic code, so it means the same on every make.
Is it safe to drive with U014B?
U014B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U014B fail an emissions test?
U014B 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 U014B to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will U014B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.