U0131 on Buick: How to Diagnose & Fix
Lost Communication with Power Steering Module
1 Buick model · 1 documented issue · 1 critical
U0131 on Buick by model: symptoms, diagnosis and fix
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.
Common Symptoms
- Sudden loss of power steering assist
- Heavy / hard steering
- Power steering warning light
- Intermittent steering assist
How to Fix
Under recall 17V116000, dealers inspect, correct the seal seating, and secure the EPS connector seals free of charge. Owners should verify the recall has been completed by VIN; if assist is lost, have the EPS connectors and module inspected for corrosion.
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Sources for this issue (1)
U0131 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U0131 mean on a 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 it is documented across 1 model: LaCrosse.
What are the most common causes of U0131?
The most common causes of U0131 are: 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. The specific cause varies by vehicle.
How much does it cost to fix U0131 on a Buick?
Repair costs vary widely with the root cause and Buick model; each issue on this page carries its own estimate where one is published.
Looking for U0131 on a different make?
View U0131 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.