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P0401 Diagnostic Trouble Code Discussion for December 2016

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2000 Chevrolet Tahoe LT 5.3L Misfire VIN: 1GNEK13T3Y
P0401: Insufficient EGR Flow Detected. ... have covered a lot of ground. In looking recently at my Freeze frame data for the 300 codes I see EGR command and position is almost always at highway speed, with EGR at or around 50%. My p0401 code is almost the opposite with the E...
December 06, 2016