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P0401 Diagnostic Trouble Code Discussion for February 2015

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2005 Hyundai Santa Fe GLS 3.5L Poor Idle Quality, MIL Lamp on VIN: KM8SC13E55
P0401: EGR System - Insufficient Flow Detected. With the vacuum line connected to the EGR valve, the valve will stay wide open all the time. This setup has a line coming off the throttle body with manifold vacuum which connects to a 'tee". One line tees off directly to the EGR valve, the other tees off ...
February 13, 2015