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P0401 Diagnostic Trouble Code Discussion for September 2008

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Ford F-150 Eddie Bauer 5.0L MIL Lamp on VIN: 1FTEX14NXT
P0401: EGR Flow. ... times with the check engine light on with a code P0401. I am more of a GM guy and am having trouble here. I found the pipe to the EGR was broken and replaced that also I replaced the pressure feedback sensor. The EGR will hold vacuum and also the engine wi...
September 02, 2008
2006 Ford E-350 Super Duty 6.0L No Start VIN: 1FDWE35P16
P0401: Insufficient EGR Flow Detected. This vehicle is one of the city ambulances. Check for no start condition, found ICP voltage low while cranking (.50 to.60 volts) test said voltage should be minimum of .80 volts to enable injectors to function. Installed battery charger and vehicle started. Ch...
September 02, 2008
1996 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V1T
P0401: EGR System Insufficient Flow Detected. ... code p0401 for low e.g.r. flow. This system uses the MAP information to determine if the e.g.r. system is working correctly, not a temp sensor. I have had this code on a lot of Camrys in the past and a couple of RAV4s and they are very prone to wearing out...
September 02, 2008
2006 Ford E-350 Super Duty 6.0L No Start VIN: 1FDWE35P16
P0401: Insufficient EGR Flow Detected. This vehicle is one of the city ambulances. Check for no start condition, found ICP voltage low while cranking (.50 to.60 volts) test said voltage should be minimum of .80 volts to enable injectors to function. Installed battery charger and vehicle started. Ch...
September 03, 2008
2000 Honda Odyssey LX 3.5L MIL Lamp on VIN: 2HKRL1857Y
P0401: EGR System Insufficient Flow Detected. i replace the new one from dealer . the passage clear. clear the code . but the cel come back /please help
September 08, 2008
1999 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18L9X
P0401: EGR Insufficient flow. Hello I have these 2 codes that seem to contradict themselves. The valve seems fine and there are no blockages in any lines and the vacuum lines appear intact. Cannot seem to find what would cause both those codes and why would it detect excessive flow and the...
September 10, 2008
2002 Isuzu Rodeo S 2.2L MIL Lamp on VIN: 4S2CK58D62
P0401: Insufficient EGR System Flow Detected. ... too many of those. It keeps setting the code p0401 for EGR LOW FLOW. The big linear Egr valve, with the 5 pin connector & no vac. hose, mounts on the back of the head, and I ran the engine with the valve removed to verify I had vacuum and exhaust at th...
September 18, 2008
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V4W
P0401: EGR System Insufficient Flow Detected. hi to all i have a 98 rav4 with a p0401 low egr flow i dint have any vacuum going to the egr valve so we tested the vsv valve and vacuum modulator valve after replacing the vacuum modulator valve the egr seemed to work but after driving same code if you pull a...
September 24, 2008
2000 Toyota Camry CE 2.2L MIL Lamp on VIN: JT2BG22K5Y
P0401: EGR System Insufficient Flow Detected. This car has egr insufficient flow code. Tested egr and it is working. Has vacuum going to egr valve when commanded on at 2500 rpm. Has anyone had this problem? Could it be a bad map sensor? Any input would be great.
September 24, 2008
1996 Ford F-150 Eddie Bauer 5.0L MIL Lamp on VIN: 1FTEX14NXT
P0401: EGR Flow. ... times with the check engine light on with a code P0401. I am more of a GM guy and am having trouble here. I found the pipe to the EGR was broken and replaced that also I replaced the pressure feedback sensor. The EGR will hold vacuum and also the engine wi...
September 02, 2008
2006 Ford E-350 Super Duty 6.0L No Start VIN: 1FDWE35P16
P0401: Insufficient EGR Flow Detected. This vehicle is one of the city ambulances. Check for no start condition, found ICP voltage low while cranking (.50 to.60 volts) test said voltage should be minimum of .80 volts to enable injectors to function. Installed battery charger and vehicle started. Ch...
September 02, 2008
1996 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V1T
P0401: EGR System Insufficient Flow Detected. ... code p0401 for low e.g.r. flow. This system uses the MAP information to determine if the e.g.r. system is working correctly, not a temp sensor. I have had this code on a lot of Camrys in the past and a couple of RAV4s and they are very prone to wearing out...
September 02, 2008
2006 Ford E-350 Super Duty 6.0L No Start VIN: 1FDWE35P16
P0401: Insufficient EGR Flow Detected. This vehicle is one of the city ambulances. Check for no start condition, found ICP voltage low while cranking (.50 to.60 volts) test said voltage should be minimum of .80 volts to enable injectors to function. Installed battery charger and vehicle started. Ch...
September 03, 2008
2000 Honda Odyssey LX 3.5L MIL Lamp on VIN: 2HKRL1857Y
P0401: EGR System Insufficient Flow Detected. i replace the new one from dealer . the passage clear. clear the code . but the cel come back /please help
September 08, 2008
1999 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18L9X
P0401: EGR Insufficient flow. Hello I have these 2 codes that seem to contradict themselves. The valve seems fine and there are no blockages in any lines and the vacuum lines appear intact. Cannot seem to find what would cause both those codes and why would it detect excessive flow and the...
September 10, 2008
2002 Isuzu Rodeo S 2.2L MIL Lamp on VIN: 4S2CK58D62
P0401: Insufficient EGR System Flow Detected. ... too many of those. It keeps setting the code p0401 for EGR LOW FLOW. The big linear Egr valve, with the 5 pin connector & no vac. hose, mounts on the back of the head, and I ran the engine with the valve removed to verify I had vacuum and exhaust at th...
September 18, 2008
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V4W
P0401: EGR System Insufficient Flow Detected. hi to all i have a 98 rav4 with a p0401 low egr flow i dint have any vacuum going to the egr valve so we tested the vsv valve and vacuum modulator valve after replacing the vacuum modulator valve the egr seemed to work but after driving same code if you pull a...
September 24, 2008
2000 Toyota Camry CE 2.2L MIL Lamp on VIN: JT2BG22K5Y
P0401: EGR System Insufficient Flow Detected. This car has egr insufficient flow code. Tested egr and it is working. Has vacuum going to egr valve when commanded on at 2500 rpm. Has anyone had this problem? Could it be a bad map sensor? Any input would be great.
September 24, 2008