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P0401 Diagnostic Trouble Code Discussion for September 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: 1JPDONOTHA
P0401: EGR System Insufficient Flow Detected. This rav 4come to us whit ses light on p0401 follow the chart and replaced egr but still the same also check the valve selenoid but nothing changed .I cleaned the exhaust tube and the intake hole and after a couple of days light come on again ,could someonehel...
September 08, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: 1JPDONOTHA
P0401: EGR System Insufficient Flow Detected. This rav 4come to us whit ses light on p0401 follow the chart and replaced egr but still the same also check the valve selenoid but nothing changed .I cleaned the exhaust tube and the intake hole and after a couple of days light come on again ,could someonehel...
September 09, 2007
1999 Ford F-250 4.6L MIL Lamp on VIN: 1FTRF27WIX
P0401: Insufficient EGR Flow Detected. Can't get rid of this SES light, keeps coming back. Truck is running great. Checked EVR and it reads 0 at idle, 60 at 2000 rpm's in closed loop. Does anyone have any suggestions? Thanx in advance.
September 14, 2007
2004 Ford Explorer XLS 4.0L MIL Lamp on VIN: 1FMZU62K54
P0401: Insufficient EGR Flow Detected (ESM System). ... service. After service P0106 and P0401 set. Ran vehicle down highway 10 miles to clear out any remaining chemicals, Cleared codes and delivered vehicle. Customer returned week later same codes. Pulled EGR and cleaned out. Reinst...
September 19, 2007
2001 Ford F-150 King Ranch 4.6L Excessive Emissions, MIL Lamp on VIN: 1FTRW07W71
P0401: egr insufficient flow. ... fixed the P0401. The first test was to put a vacuum pump on the egr valve and apply vacuum, the engine does not die. The idle is a little lower. So it has a flow problem. I removed the EGR valve, tested ok, cleaned it. It is located on drivers side of 90 d...
September 20, 2007
2000 Toyota RAV4 2.0L MIL Lamp on VIN: JT3GP10V0Y
P0401: EGR System Insufficient Flow Detected. Thanks in advance for any help/advice. we have this Rav4 with an intermittent MIL that keeps setting code PO401. When we test the system components individually,(Vacuum hoses, VSV, EGR valve, Transducer) they all test good. I even replaced the transducer to ma...
September 20, 2007
1997 Lexus SC300 3.0L MIL Lamp on VIN: JT8CD32Z3V
P0401: EGR System Insufficient Flow Detected. (Code P0401..Insufficient EGR flow) Super nice, patient customer!!! This thing is driving me nuts!! First of all EGR valve would not hold vacuum. Replaced with new and cleaned passage (removed plugs on intake and did a real number!!). Engine now stalls when va...
September 24, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: 1JPDONOTHA
P0401: EGR System Insufficient Flow Detected. This rav 4come to us whit ses light on p0401 follow the chart and replaced egr but still the same also check the valve selenoid but nothing changed .I cleaned the exhaust tube and the intake hole and after a couple of days light come on again ,could someonehel...
September 08, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: 1JPDONOTHA
P0401: EGR System Insufficient Flow Detected. This rav 4come to us whit ses light on p0401 follow the chart and replaced egr but still the same also check the valve selenoid but nothing changed .I cleaned the exhaust tube and the intake hole and after a couple of days light come on again ,could someonehel...
September 09, 2007
1999 Ford F-250 4.6L MIL Lamp on VIN: 1FTRF27WIX
P0401: Insufficient EGR Flow Detected. Can't get rid of this SES light, keeps coming back. Truck is running great. Checked EVR and it reads 0 at idle, 60 at 2000 rpm's in closed loop. Does anyone have any suggestions? Thanx in advance.
September 14, 2007
2004 Ford Explorer XLS 4.0L MIL Lamp on VIN: 1FMZU62K54
P0401: Insufficient EGR Flow Detected (ESM System). ... service. After service P0106 and P0401 set. Ran vehicle down highway 10 miles to clear out any remaining chemicals, Cleared codes and delivered vehicle. Customer returned week later same codes. Pulled EGR and cleaned out. Reinst...
September 19, 2007
2001 Ford F-150 King Ranch 4.6L Excessive Emissions, MIL Lamp on VIN: 1FTRW07W71
P0401: egr insufficient flow. ... fixed the P0401. The first test was to put a vacuum pump on the egr valve and apply vacuum, the engine does not die. The idle is a little lower. So it has a flow problem. I removed the EGR valve, tested ok, cleaned it. It is located on drivers side of 90 d...
September 20, 2007
2000 Toyota RAV4 2.0L MIL Lamp on VIN: JT3GP10V0Y
P0401: EGR System Insufficient Flow Detected. Thanks in advance for any help/advice. we have this Rav4 with an intermittent MIL that keeps setting code PO401. When we test the system components individually,(Vacuum hoses, VSV, EGR valve, Transducer) they all test good. I even replaced the transducer to ma...
September 20, 2007
1997 Lexus SC300 3.0L MIL Lamp on VIN: JT8CD32Z3V
P0401: EGR System Insufficient Flow Detected. (Code P0401..Insufficient EGR flow) Super nice, patient customer!!! This thing is driving me nuts!! First of all EGR valve would not hold vacuum. Replaced with new and cleaned passage (removed plugs on intake and did a real number!!). Engine now stalls when va...
September 24, 2007