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P0401 Diagnostic Trouble Code Discussion for June 2004

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1997 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52K9V
P0401: Insufficient EGR Flow Detected. ... in with p0401-insuficiant egr flow. visually checked all passages, worked egr valve with bi directional, all seemed normal. wrote problem off to chuck of carbon. next week car is back-same code. checked all passages and worked bi directional control again-...
June 08, 2004