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P0401 Diagnostic Trouble Code Discussion for July 2006

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1997 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5279V
P0401: . ... would be great.It keeps flagging a p0401 whicjh is something with the EGR valve it is new and I cleaned what appeared to be the passage.what am I missing? thanks...Jason
July 06, 2006
1996 Ford Taurus SHO 3.4L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: IFALP54N5T
P0401: insufficient egr flow detected. typical ford taurus problem, check engine light was the main concern of the customer, no drivability problem. did as any normal tech would do, and replaced the 3 egr parts, problem disappeared for a week or two, and showed back up. after going through multiple...
July 13, 2006
1996 Toyota Camry DX 2.2L MIL Lamp on VIN: JT2BG12K7T
P0401: EGR System Insufficient Flow Detected. ... one. Vehicle came back in next day with check engine light on and had code P0401 again. Removed EGR valve and cleaned passages and pipe from valve to exhaust. Cleaned port on intake. Replaced all the vacuum lines. Tested MAP sensor - working properly. Test...
July 19, 2006