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P0401 Diagnostic Trouble Code Discussion for November 2009

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Toyota RAV4 2.0L MIL Lamp on VIN: JT3GP10V2T
P0401: EGR System Insufficient Flow Detected. Have this vehicle that light came on and retrieved code PO401, did visual inspection and found nothing out of ordinary. Did a check by applying vacuum to EGR at idle and vehicle stalled. Removed hose to EGR valve and when warm at 2500 rpm there is no vacuum. t...
November 04, 2009
1997 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMEU16WCV
P0401: Egr insufficient flow. Hello and thanks in advance. I was wondering if any Ford techs could enlighten me as to the correct way to test out a DPFE sensor apart from buying a new one. Vacuum to EGR valve kills engine so I don't think restriction is my problem. Also the EVR tests good ...
November 05, 2009
1996 Honda Accord EX 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1HGCD5652T
P0401: EGR System Insufficient Flow Detected. thanks for any help in advance and here are the vehicle symptoms: when car is first started(cold soak) engine runs fine but once it goes into closed loop idle gets a little rough but not misfiring then as soon as it is put in gear and a little load applied eng...
November 05, 2009
1997 Toyota Camry LE 2.2L MIL Lamp on, P0401 VIN: JT2BG22K1V
P0401: EGR System Insufficient Flow Detected. car came in with p0401 code changed egr and egr modulator tested for vsv and seemd good drive cycle severall times everything seems ok but airflow... 0.00 constatly readings.
November 06, 2009
1996 Toyota Camry XLE 3.0L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... EGR insufficient flow fault P0401. The EGR valve, sensor, and VSV have been replaced for the issue. After clearing the fault, I test drove the vehicle 25 miles with frequent key cycles and the light stayed off. Delivered to customer and after sitting, ligh...
November 14, 2009
1998 Honda Accord EX 3.0L MIL Lamp on VIN: 1HGCG1652W
P0401: EGR System Insufficient Flow Detected. I had a code P0401 on this Honda, pulled the upper intake and cleaned the carbon out of the plugged up lower intake & installed sleeve and upgrade EGR Valve, thought it was a no brainer, 2 weeks later, same code...Does anyone have any advise on what direct...
November 15, 2009
2003 Ford F-350 Super Duty XL 6.0L No Start, Poor Idle Quality, Stall, Misfire VIN: 1FDWF36P43
P0401: Insufficient EGR Flow Detected. I have a 6.0 that died driving and would not restart. I had it towed to my shop for me to look at it the following morning. That morning it started right up but idled rough like it had a dead hole. I let it idle while I checked the memory codes. The codes are ...
November 18, 2009
1997 Toyota Corolla DX 1.8L MIL Lamp on VIN: 2T1BB02E9V
P0401: egr insufficient flow. replaced egr, vsv, cleaned intake passsages 2X's still having problem, checked all vacuums ok, apply vac to egr car runs rough, blew thru hose going to map sensor still same prblem - please help and thanks in advanced
November 18, 2009
1997 Toyota Corolla DX 1.8L MIL Lamp on VIN: 2T1BB02E9V
P0401: egr insufficient flow. replaced egr, vsv, cleaned intake passsages 2X's still having problem, checked all vacuums ok, apply vac to egr car runs rough, blew thru hose going to map sensor still same prblem - please help and thanks in advanced
November 19, 2009
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J01
P0401: Insufficient EGR Flow Detected. po401 po404 can not seem to lacate problem need to get this car through inspection. Has anyone seen this problem before? please help this a good customer and a nice lady
November 24, 2009
1996 Toyota RAV4 2.0L MIL Lamp on VIN: JT3GP10V2T
P0401: EGR System Insufficient Flow Detected. Have this vehicle that light came on and retrieved code PO401, did visual inspection and found nothing out of ordinary. Did a check by applying vacuum to EGR at idle and vehicle stalled. Removed hose to EGR valve and when warm at 2500 rpm there is no vacuum. t...
November 04, 2009
1997 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMEU16WCV
P0401: Egr insufficient flow. Hello and thanks in advance. I was wondering if any Ford techs could enlighten me as to the correct way to test out a DPFE sensor apart from buying a new one. Vacuum to EGR valve kills engine so I don't think restriction is my problem. Also the EVR tests good ...
November 05, 2009
1996 Honda Accord EX 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1HGCD5652T
P0401: EGR System Insufficient Flow Detected. thanks for any help in advance and here are the vehicle symptoms: when car is first started(cold soak) engine runs fine but once it goes into closed loop idle gets a little rough but not misfiring then as soon as it is put in gear and a little load applied eng...
November 05, 2009
1997 Toyota Camry LE 2.2L MIL Lamp on, P0401 VIN: JT2BG22K1V
P0401: EGR System Insufficient Flow Detected. car came in with p0401 code changed egr and egr modulator tested for vsv and seemd good drive cycle severall times everything seems ok but airflow... 0.00 constatly readings.
November 06, 2009
1996 Toyota Camry XLE 3.0L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... EGR insufficient flow fault P0401. The EGR valve, sensor, and VSV have been replaced for the issue. After clearing the fault, I test drove the vehicle 25 miles with frequent key cycles and the light stayed off. Delivered to customer and after sitting, ligh...
November 14, 2009
1998 Honda Accord EX 3.0L MIL Lamp on VIN: 1HGCG1652W
P0401: EGR System Insufficient Flow Detected. I had a code P0401 on this Honda, pulled the upper intake and cleaned the carbon out of the plugged up lower intake & installed sleeve and upgrade EGR Valve, thought it was a no brainer, 2 weeks later, same code...Does anyone have any advise on what direct...
November 15, 2009
2003 Ford F-350 Super Duty XL 6.0L No Start, Poor Idle Quality, Stall, Misfire VIN: 1FDWF36P43
P0401: Insufficient EGR Flow Detected. I have a 6.0 that died driving and would not restart. I had it towed to my shop for me to look at it the following morning. That morning it started right up but idled rough like it had a dead hole. I let it idle while I checked the memory codes. The codes are ...
November 18, 2009
1997 Toyota Corolla DX 1.8L MIL Lamp on VIN: 2T1BB02E9V
P0401: egr insufficient flow. replaced egr, vsv, cleaned intake passsages 2X's still having problem, checked all vacuums ok, apply vac to egr car runs rough, blew thru hose going to map sensor still same prblem - please help and thanks in advanced
November 18, 2009
1997 Toyota Corolla DX 1.8L MIL Lamp on VIN: 2T1BB02E9V
P0401: egr insufficient flow. replaced egr, vsv, cleaned intake passsages 2X's still having problem, checked all vacuums ok, apply vac to egr car runs rough, blew thru hose going to map sensor still same prblem - please help and thanks in advanced
November 19, 2009
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J01
P0401: Insufficient EGR Flow Detected. po401 po404 can not seem to lacate problem need to get this car through inspection. Has anyone seen this problem before? please help this a good customer and a nice lady
November 24, 2009