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P0401 Diagnostic Trouble Code Discussion for May 2006

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1998 Toyota Camry CE 2.2L MIL Lamp on, po401 VIN: 4T1BG22KXW
P0401: EGR System Insufficient Flow Detected. egr system working fine but fails system test when car is road tested
May 03, 2006
1999 Ford E-250 Econoline 4.2L MIL Lamp on VIN: 1FTPS2425X
P0401: Low EGR Flow. Mil is on with PO401 "low EGR Flow" in memory. I performed the complete test in Alldata. DPFE Sensor tests good and EGR valve opens. The end result of the Alldata test is to check EGR vacuum passages and orifice tube. I removed the valve and started th...
May 11, 2006
1998 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K4W
P0401: EGR System Insufficient Flow Detected. hello, vehicle came in with a 40441 put on new vapor pressure sensor vsv. cleared light and now is back on. Smoked evap sytem for leaks no leaks found. do not have a scan tool to open and close all my vsv for evap sytem. did manually check to see if both vsv w...
May 11, 2006
2001 Toyota Camry LE 3.0L MIL Lamp on VIN: 4T1BF22K01
P0401: EGR System Insufficient Flow Detected. Hello everyone. I am attempting to fix a toyota for a friend. We are a Mercedes specialty shop so I don't have the proper scan tools for this vehicle. A shop next door pulled the codes using a snap on scanner. I had three codes at first po401, po402 and anothe...
May 11, 2006
1997 Ford F-150 4.2L Hesitation, Misfire, MIL Lamp on VIN: 1FTEF1723V
P0401: insufficient egr flow detected. ... picked up @auction last week. Check engine light was on p0401 and engine stumbled on light accel (also in park and 1700-2200 rpm).replaced dpfe sensor due to sticking.removed egr valve and egr plate.intake etc. not pluged. At around 100f in park bring rpms...
May 27, 2006