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U0401 Diagnostic Trouble Code Discussion for June 2009

Implausible Data Received From ECM / PCM

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Trouble Ticket Help Requests for DTC U0401
Help Request Posted
2007 Ford Freestyle SEL 3.0L Wrench Lite On VIN: 1FMZK02137
U0401: Invalid data received from ECM/PCM. ... look at this help request. This is the first time I have seen this problem in my shop. You can clear the codes and they come right back. I did find TSB 07-2-2 pertaining to the engine wire harness chaffing on the AC lines at the firewall and setting code U...
June 22, 2009