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P0401 Diagnostic Trouble Code Discussion for April 2007

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V3W
P0401: EGR System Insufficient Flow Detected. ... couple of times now. Keeps setting a code P0401 (Insufficient EGR flow). The EGR valve was replaced by another shop before I got it and is working fine. I removed the valve to check for carbon and that was ok. Vacuum to the modulator tests good, flow throu...
April 02, 2007
2003 Ford F-350 Super Duty XLT 6.0L Hesitation, Surge, Cuts out VIN: 1FTSW31P23
P0401: Insufficient EGR Flow Detected. would like to say thanks in advance
April 03, 2007
1999 Toyota Camry CE 2.2L Excessive Emissions VIN: 4T1BG22K2X
P0401: EGR System Insufficient Flow Detected. Code P0401- resets itself almost immediately on road test. Have performed diagnostics but cannot locate source of problem. Diagnostics tree shows all components working fine. EGR valve is not stuck open. EGR-VSV is new. EGR-VSV circuit is OK. Can trigger EGR w...
April 08, 2007
2003 Ford F-350 Super Duty XLT 6.0L Hesitation, Surge, Cuts out VIN: 1FTSW31P23
P0401: Insufficient EGR Flow Detected. would like to say thanks in advance
April 09, 2007
1997 Toyota Camry CE 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. Hi guys and thank you for taking the time to help.This car failed smog test only due to check engine light on and code 401.The problem is that it gets vacuum to the EGR only for 2 seconds and then it goes back down to 0 inch of vacuum,if i step on the gas agai...
April 11, 2007
1999 Mitsubishi Diamante 3.5L MIL Lamp on VIN: 6MMAP57P0Y
P0401: egr low flow. ... fuel injection, throttle body and egr port cleaning service. One week later vehicle returns with a mil light code P0401 (Egr low flow). Tested EGR valve by holding vaccuum at idle, which made engine stumble. Went a head a recleaned both ports again and rep...
April 23, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V3W
P0401: EGR System Insufficient Flow Detected. ... couple of times now. Keeps setting a code P0401 (Insufficient EGR flow). The EGR valve was replaced by another shop before I got it and is working fine. I removed the valve to check for carbon and that was ok. Vacuum to the modulator tests good, flow throu...
April 02, 2007
2003 Ford F-350 Super Duty XLT 6.0L Hesitation, Surge, Cuts out VIN: 1FTSW31P23
P0401: Insufficient EGR Flow Detected. would like to say thanks in advance
April 03, 2007
1999 Toyota Camry CE 2.2L Excessive Emissions VIN: 4T1BG22K2X
P0401: EGR System Insufficient Flow Detected. Code P0401- resets itself almost immediately on road test. Have performed diagnostics but cannot locate source of problem. Diagnostics tree shows all components working fine. EGR valve is not stuck open. EGR-VSV is new. EGR-VSV circuit is OK. Can trigger EGR w...
April 08, 2007
2003 Ford F-350 Super Duty XLT 6.0L Hesitation, Surge, Cuts out VIN: 1FTSW31P23
P0401: Insufficient EGR Flow Detected. would like to say thanks in advance
April 09, 2007
1997 Toyota Camry CE 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. Hi guys and thank you for taking the time to help.This car failed smog test only due to check engine light on and code 401.The problem is that it gets vacuum to the EGR only for 2 seconds and then it goes back down to 0 inch of vacuum,if i step on the gas agai...
April 11, 2007
1999 Mitsubishi Diamante 3.5L MIL Lamp on VIN: 6MMAP57P0Y
P0401: egr low flow. ... fuel injection, throttle body and egr port cleaning service. One week later vehicle returns with a mil light code P0401 (Egr low flow). Tested EGR valve by holding vaccuum at idle, which made engine stumble. Went a head a recleaned both ports again and rep...
April 23, 2007