Invalid Data Received from ECM/PCM
Another module is receiving invalid data from the engine control module.
Informational only. Consult a qualified mechanic.
- ECM software issue
- CAN bus interference
- Faulty ECM
Try clearing codes. May need ECM reflash or replacement.
What does U0401 mean?
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.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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