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P0402 Diagnostic Trouble Code Discussion for February 2010

EGRC-BPT Valve Function

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Trouble Ticket Help Requests for DTC P0402
Help Request Posted
2003 Ford Expedition XLT 5.4L Poor Idle Quality, Misfire VIN: 1FMFU188L8
P0402: Excessive EGR Flow Detected (ESM System). ... and not finding anything I can use. Initial complaint from customer was a rough idle, and rough acceleration. New customer, so I had no maintenance history and customer didn't know either. I pulled codes and retrieved P0401-EGR Insufficient Flow. I foun...
February 04, 2010