U0131 on Buick
Lost Communication with Power Steering Module
U0131 on Buick vehicles indicates lost communication with power steering module. Au7o has documented this code across 1 Buick model — most commonly on LaCrosse. This is a network communication code meaning the vehicle's computers have lost communication with the power steering control module over the data bus (CAN). Modern cars link control modules so they can share data, and this code sets when other modules stop receiving expected messages from the power steering unit. The most common result is loss or reduction of power-assisted steering, making the wheel feel heavy, along with a warning light. It generally points to a wiring/connector or power problem at the steering module, a bus fault, or a failed module rather than a mechanical steering issue.
Common Causes of U0131
- •Loss of power or ground to the power steering module
- •Open or shorted CAN bus wiring to the module
- •Corroded or loose connector at the steering module
- •Blown fuse feeding the power steering system
- •Failed power steering control module
- •Other module or wiring fault disrupting the data bus
- •Software/configuration mismatch after a repair
U0131 on Buick by Model
Buick LaCrosse(1 issue)
- Electronic Power Steering Connector Corrosion / Loss of Assist (Recall 17V116000)2017
On certain third-generation LaCrosse models, the electrical connectors for the Electronic Power Steering (EPS) system were not properly sealed, allowing water intrusion that corrodes the connectors. The resulting fault can cause a sudden loss of power steering assist, increasing crash risk, particularly at low speeds. GM issued NHTSA recall 17V116000 to address it.
Looking for U0131 on a different make?
View U0131 across all makes →Frequently Asked Questions
What does U0131 mean on Buick?▼
U0131 stands for "Lost Communication with Power Steering Module." This is a network communication code meaning the vehicle's computers have lost communication with the power steering control module over the data bus (CAN). Modern cars link control modules so they can share data, and this code sets when other modules stop receiving expected messages from the power steering unit. The most common result is loss or reduction of power-assisted steering, making the wheel feel heavy, along with a warning light. It generally points to a wiring/connector or power problem at the steering module, a bus fault, or a failed module rather than a mechanical steering issue. On Buick specifically, this code is documented across 1 model.
What causes U0131 on Buick vehicles?▼
Common causes on Buick: Loss of power or ground to the power steering module, Open or shorted CAN bus wiring to the module, Corroded or loose connector at the steering module, Blown fuse feeding the power steering system, Failed power steering control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0131 on a Buick?▼
Repair costs vary widely depending on the root cause and specific Buick model.
Which Buick models have U0131 documented?▼
Au7o has documented U0131 on 1 Buick model: LaCrosse.