U0111 on Polestar
Lost Communication With Battery Energy Control Module "A"
U0111 on Polestar vehicles indicates lost communication with battery energy control module "a". Au7o has documented this code across 1 Polestar model — most commonly on Polestar 2. 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 Polestar by Model
Polestar Polestar 2(1 issue)
- Battery Energy Control Module (BECM) Microprocessor Reset — High-Voltage Disconnect and Loss of Drive Power (Recall 21V110)2021-2022
A fault in the BECM microprocessor operating system causes the processor to reset while the car is in operation. The reset drops the high-voltage contactors, disconnecting the traction pack from the drive units and producing an immediate loss of propulsion with no warning. NHTSA campaign 21V110000 (Polestar R10079) covered 3,457 US 2021-2022 Polestar 2 vehicles, reported February 23, 2021, with owner letters mailed April 23, 2021. This is the battery-management-side power-loss campaign and is separate from both the front inverter capacitor tin-plating recall and the later BMS charge-limit software campaign — a single car can be open on more than one.
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View U0111 across all makes →Frequently Asked Questions
What does U0111 mean on Polestar?▼
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 Polestar specifically, this code is documented across 1 model.
What causes U0111 on Polestar vehicles?▼
Common causes on Polestar: 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 Polestar?▼
Repair costs vary widely depending on the root cause and specific Polestar model.
Which Polestar models have U0111 documented?▼
Au7o has documented U0111 on 1 Polestar model: Polestar 2.