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U0401 Diagnostic Trouble Code Discussion for January 2012

Implausible Data Received From ECM / PCM

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Trouble Ticket Help Requests for DTC U0401
Help Request Posted
2005 Chevrolet Aveo LS 1.6L MIL Lamp on, "hold" lamp VIN: KL1TD52665
U0401: TCM Received Invalid Data From ECM. ... your time and efforts! As noted, this Aveo exhibits an intermittent p0300 always. No misfire counters on my Tech 2, no driveability issues and cannot feel a misfire. The real problem for my post involves the "hold" lamp that continually flashes in ...
January 11, 2012