U0111 on Volvo
Lost Communication With Battery Energy Control Module "A"
U0111 on Volvo vehicles indicates lost communication with battery energy control module "a". Au7o has documented this code across 1 Volvo model — most commonly on XC40. Sets when a module loses data-bus communication with Battery Energy Control Module 'A' (the high-voltage battery management controller) and no longer receives its expected messages.
Common Causes of U0111
- •Open or shorted bus wiring to the battery energy control module
- •Corroded or loose connector / poor ground
- •Blown fuse / lost low-voltage power feed
- •Low 12V battery voltage
- •Failed battery energy control module
U0111 on Volvo by Model
Volvo XC40(1 issue)
- Battery Energy Control Module Microprocessor Reset Causes High-Voltage Disconnect and Sudden Loss of Drive Power2021-2022
In the XC40 Recharge BEV the Battery Energy Control Module (BECM) supervises the traction pack contactors. A microprocessor fault causes the BECM to reset while driving; on reset it opens the high-voltage contactors as a fail-safe, instantly disconnecting the traction battery from the drive units. The result is an abrupt, total loss of propulsion at speed with no warning — the car coasts, power steering and brake assist remain but regen and drive are gone. This is distinct from the well-known 12V accessory-battery no-start: here the 12V system is fine and the vehicle is already moving. NHTSA campaign 21V109000 covers 2021-2022 XC40 Recharge.
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View U0111 across all makes →Frequently Asked Questions
What does U0111 mean on Volvo?▼
U0111 stands for "Lost Communication With Battery Energy Control Module "A"." Sets when a module loses data-bus communication with Battery Energy Control Module 'A' (the high-voltage battery management controller) and no longer receives its expected messages. On Volvo specifically, this code is documented across 1 model.
What causes U0111 on Volvo vehicles?▼
Common causes on Volvo: Open or shorted bus wiring to the battery energy control module, Corroded or loose connector / poor ground, Blown fuse / lost low-voltage power feed, Low 12V battery voltage, Failed battery energy control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0111 on a Volvo?▼
Repair costs vary widely depending on the root cause and specific Volvo model.
Which Volvo models have U0111 documented?▼
Au7o has documented U0111 on 1 Volvo model: XC40.