U0122 on 2024-2025 Subaru Crosstrek — Lost Communication With Vehicle Dynamics Control Module
1 vehicles · 1 makes
How to diagnose and fix U0122: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Subaru Crosstrek · 2024–2025
The 2024 bulletin provides enhanced EPS self-diagnosis software for C2531, C2532, U0122 and B2811. A 2024 owner reported lost steering assist and a car awaiting rack replacement, not a completed successful repair. Separately, a 2025 owner (ODI 11744713) reports a dealer diagnosis of C2532 and replacement of steering gear 34110FN03A. That is one reported outcome, not a universal fix. Applies to: 2024 Crosstrek with the documented EPS fault codes and a ROM ID covered by bulletin 04-29-23R. Production changes start at VIN R3756650 (Indiana) and RH321601 (Japan). The separate 2025 owner report does not extend that bulletin to 2025 or prove the same cause.
Common Symptoms
- Steering warning lamp
- Reduced power-steering assistance
How to Fix
Have a steering warning or loss of assistance diagnosed promptly. For 2024 vehicles, a Subaru technician checks the stored codes and ROM ID and follows bulletin 04-29-23R reprogramming when eligible; other faults require the service-manual diagnosis. The 2025 owner-reported rack replacement is not evidence that the bulletin applies to 2025 or that every vehicle needs a rack. Replacement requires the diagnosed condition and exact fitment. Normal warranty rules apply; this is not a recall or a promise of free repair.
Sources for this issue (3)
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U0122 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 U0122 mean?
U0122 stands for "Lost Communication With Vehicle Dynamics Control Module." Sets when a module loses data-bus communication with the Vehicle Dynamics Control Module (stability/VDC/VSA/ESC controller) and no longer receives its expected messages.
What are the most common causes of U0122?
The most common causes of U0122 are: Open or shorted bus wiring to the vehicle dynamics module, Corroded or loose connector / poor ground, Blown fuse / lost power feed, Low battery voltage, Failed vehicle dynamics control module. The specific cause varies by vehicle.
How much does it cost to fix U0122?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by U0122?
Au7o has documented U0122 across 1 vehicle models from 1 manufacturers: Subaru.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.