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P0401 Diagnostic Trouble Code Discussion for August 2012

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2002 Honda Accord EX 3.0L MIL Lamp on VIN: 1HGCG16542
P0401: EGR System Insufficient Flow Detected. p0401 returning after cleaning port. I've done hundreds of these at honda dealer, never come back. Egr vls is 1.1v at idle, goes up to 2.5v at 1700rpm. When egr is commanded, the pink wire is showing 6v at egr valve connector and showing same at b7 pin at pcm....
August 01, 2012