Another module is receiving invalid data from the engine control module.
Informational only. Consult a qualified mechanic.
Try clearing codes. May need ECM reflash or replacement.
The U0401 OBD-II diagnostic trouble code (DTC) indicates: invalid data received from ecm/pcm. This is a medium-severity network code that your vehicle's onboard diagnostics system triggers when another module is receiving invalid data from the engine control module. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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