U0111: Communication with the battery energy control unit has been lost
Communication with the battery energy control unit has been lost. It is usually the wiring or its power supply.
| Code | U0111 |
|---|---|
| System | Communication network |
| Group | U01xx, Lost communication with control units |
| Type | Generic: it means the same on every make |
How to read and clear U0111 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 U0111 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
- U010D The turbocharger control unit B is not answering on the car network
- U010E The AdBlue control unit is not answering on the car network
- U010F The air conditioning control unit is not answering on the car network
- U0110 The traction motor control unit is not answering on the car network
- U0112 The battery energy control unit B is not answering on the car network
- U0114 The four-wheel drive clutch control unit is not answering on the car network
- U0115 The engine control unit motor B control unit is not answering on the car network
- U0116 The coolant temperature control unit is not answering on the car network
- U0100 Lost communication with engine control module (ECM/PCM A)
- U0101 Lost communication with transmission control module (TCM)
- U0102 Lost communication with transfer case control module
- U0103 Lost communication with the gear shift module
What does code U0111 mean?
Communication with the battery energy control unit has been lost. It is usually the wiring or its power supply.
How do you clear U0111?
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, U0111 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.
