U044B: The battery energy control unit C is sending data that cannot be used
The battery energy control unit C is sending data that cannot be used. It is usually that control unit, its power supply or the network wiring.
| Code | U044B |
|---|---|
| System | Communication network |
| Group | U04xx, Invalid data between control units |
| Type | Generic: it means the same on every make |
How to read and clear U044B with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see U044B with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- U0447 The gateway of the car’s networks is sending invalid data
- U0448 The gateway B is sending data that cannot be used
- U0449 The gateway C is sending data that cannot be used
- U044A The gateway D is sending data that cannot be used
- U044C The traction battery wireless charge module is sending data that cannot be used
- U044D The generator B control unit is sending data that cannot be used
- U044F The door mirror control unit B is sending data that cannot be used
- U0450 Invalid data has arrived from car network gateway D
- U0401 Invalid data received from the engine control module (ECM/PCM)
- U0402 Invalid data received from the transmission control module
- U0415 Invalid data received from the ABS control module
- U0416 Invalid data received from the vehicle dynamics control module
What does code U044B mean?
The battery energy control unit C is sending data that cannot be used. It is usually that control unit, its power supply or the network wiring.
How do you clear U044B?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, U044B comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
