Code U0122 on the 2023 Honda CR-V indicates lost communication with the Vehicle Stability Control (VSC) module, known as Vehicle Stability Assist (VSA) on Honda vehicles. This module integrates ABS, traction control, and electronic stability control functions.
Honda VSA System
Honda's VSA system combines anti-lock braking, traction control, and stability control in one integrated module. It communicates with the engine, transmission, and electric power steering systems to coordinate vehicle dynamics control. Communication loss disables all these integrated safety features.
Multiple Warning Lights
With U0122 present, expect the ABS, VSA, and potentially the VSA OFF indicator to illuminate. The brake system warning may also activate. Honda Sensing features that rely on VSA data, including Collision Mitigation Braking, may be disabled. The multi-information display shows related warnings.
Diagnostic Path
The VSA modulator/control unit is located in the engine compartment. Check the main connector for corrosion - this is common with the CR-V's higher hood line allowing more moisture exposure. Verify all power and ground supplies to the module. Test CAN communication at the VSA connector.
Repair Requirements
Address power supply and connector issues first. If the VSA module has failed, replacement involves brake hydraulic work since the controller and modulator are typically integrated. Honda HDS is required for system initialization and brake bleeding after major VSA repairs.