Invalid Data Received From ECM/PCM

Q: What does code U0401 mean?

Invalid Data Received From ECM/PCM: The vehicle is receiving invalid or corrupted data from the engine control module.

Network Code · High

What does U0401 mean?

The vehicle is receiving invalid or corrupted data from the engine control module.

System: Module Communication

U0401 is a network diagnostic trouble code indicating invalid data received from ecm/pcm. This code is classified as high severity, which means: address soon — may cause further damage.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.