U0131 on RAM: How to Diagnose & Fix
Lost Communication with Power Steering Module
1 RAM model · 1 documented issue · 1 critical · $1,800-$4,000 repair
U0131 on RAM by model: symptoms, diagnosis and fix
The DT-generation Ram 1500 uses a belt-driven electric power steering (EPS) system with the assist motor and control module integrated into the rack-and-pinion. When the EPS module shorts out or the motor fails, the driver loses power assist — sometimes momentarily at startup, sometimes permanently — and the steering becomes very heavy with an 'EPS' or 'Service Power Steering' warning. Because the motor/module are not serviceable separately, a failure requires replacing the entire rack assembly. Earlier 2015-2016 trucks had a related FCA-identified circuit-board contamination defect in the EPS unit.
Common Symptoms
- Sudden heavy/manual steering with loss of power assist
- EPS or 'Service Power Steering' warning light
- Momentary loss of assist at startup
- Clunk or whine from the steering rack
- Steering wander or dead spot on-center
How to Fix
Confirm with a scan tool (EPS control module fault codes) and check the 48V/12V supply and EPS connector before condemning the rack. The fix for a failed unit is replacement of the complete electric rack-and-pinion assembly and recalibration; owners report total repair bills of roughly $3,000-$4,000, often not covered once the basic/powertrain warranty expires. Keep the steering software flashed to the latest level, as some startup-only assist dropouts are resolved by an EPS software update rather than hardware.
Sources for this issue (3)
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 RAM?
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 RAM it is documented across 1 model: 1500.
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 RAM?
Published repair estimates on RAM range from $1,800 to $4,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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.