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Code

U0122

Network

Lost communication with vehicle dynamics control module

Modules cannot reach the vehicle dynamics control module.

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Most likely causes

VSC/ESP module fault
CAN wiring fault
Low voltage

Symptoms you may notice

ESC/ABS lights
Stability control off

Checks to run

Check the VSC module power
Test CAN wiring
Scan the module

Tools you may need

Multimeter OBD-II scanner

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

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High-speed CAN communication bus

Control module communication bus off

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