Join Now
International Automotive Technicians Network

P0401 Diagnostic Trouble Code Discussion for January 2007

Insufficient EGR Flow Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1999 Saturn SL1 1.9L Surge, CODE P0401A VIN: 1G8ZH528XX
P0401: EGR insufficient flow. ... problem... Intermittent code P0401 shows up once every 2 months customer complain of Intermitent lack of power under smooth acceleration just after a cold start (witch I have not been able to reproduce) I have the good EGR valve model on the car (related ...
January 08, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V9W
P0401: EGR System Insufficient Flow Detected. hello and here we go with another problem child - 1998 rav 4 - reoccuring po401 code - car came in 1 week go for same code - test egr operation and got engine to stall while preforming tests removed valve and cleaned passages - cleared codes and road tested ca...
January 11, 2007
2001 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMRU15W11
P0401: insufficient egr flow. hello ford techs,have this expedition with low egr flow,previous shop had performed throttle body cleaning & egr ports cleaned,replaced fuel filter & serviced fuel injectors-don't ask me why?...anyways checked egr valve (ok),checked solenoides (ok)seem...
January 12, 2007
1997 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V1V
P0401: EGR System Insufficient Flow Detected. ... guys! I retrieved a P0401 for EGR system flow insufficient. I use Shop Key (Mitchell based) for testing and while engine is operating EGR does function. The vacuum circuit is intact and has no leaks. The switching valve operates under off idle and under lo...
January 17, 2007
1997 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTDX1764V
P0401: Insufficient EGR flow. This vehicle came in with a plugged EGR port at the intake. The valve also some contained carbon deposits. We cleared the maniflod and replaced the EGR valve with a Ford factory unit. Testing the EGR by applying vacuum caused the engine to lope so we now know ...
January 18, 2007
1999 Isuzu Trooper S 3.5L MIL Lamp on VIN: JACDJ58XXX
P0401: Insufficient EGR System Flow Detected. after replacing egr valve light & testing all wires,light comes on and goes of intermenttly with previous code present
January 18, 2007
1997 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTDX1764V
P0401: Insufficient EGR flow. This vehicle came in with a plugged EGR port at the intake. The valve also some contained carbon deposits. We cleared the maniflod and replaced the EGR valve with a Ford factory unit. Testing the EGR by applying vacuum caused the engine to lope so we now know ...
January 19, 2007
2000 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMRU1562Y
P0401: insufficent egr flow detected. This vehicle came into my shop with a P0401 code. Checked the system and found what appeared to be a bad EGR Valve. Replaced the EGR valve, DPFE sensor and EGR valve position sensor. Test drove and everything was fine. Customer returned 2 hours later and same ...
January 19, 2007
2005 GMC Sierra 2500 HD SLE 6.6L Hesitation, Stall, MIL Lamp on VIN: 1GTHK29215
P0401: EGR Flow Insufficient Detected. this problem all started after changing fuel filters and oil and filter as part of the routine up keep.the customers complaint was intermittent mil and lack of power.as soon as the light goes out truck runs perfect.hooked up scanner pulled codes po299 po401 po...
January 21, 2007
1999 Saturn SL1 1.9L Surge, CODE P0401A VIN: 1G8ZH528XX
P0401: EGR insufficient flow. ... problem... Intermittent code P0401 shows up once every 2 months customer complain of Intermitent lack of power under smooth acceleration just after a cold start (witch I have not been able to reproduce) I have the good EGR valve model on the car (related ...
January 08, 2007
1998 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V9W
P0401: EGR System Insufficient Flow Detected. hello and here we go with another problem child - 1998 rav 4 - reoccuring po401 code - car came in 1 week go for same code - test egr operation and got engine to stall while preforming tests removed valve and cleaned passages - cleared codes and road tested ca...
January 11, 2007
2001 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMRU15W11
P0401: insufficient egr flow. hello ford techs,have this expedition with low egr flow,previous shop had performed throttle body cleaning & egr ports cleaned,replaced fuel filter & serviced fuel injectors-don't ask me why?...anyways checked egr valve (ok),checked solenoides (ok)seem...
January 12, 2007
1997 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V1V
P0401: EGR System Insufficient Flow Detected. ... guys! I retrieved a P0401 for EGR system flow insufficient. I use Shop Key (Mitchell based) for testing and while engine is operating EGR does function. The vacuum circuit is intact and has no leaks. The switching valve operates under off idle and under lo...
January 17, 2007
1997 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTDX1764V
P0401: Insufficient EGR flow. This vehicle came in with a plugged EGR port at the intake. The valve also some contained carbon deposits. We cleared the maniflod and replaced the EGR valve with a Ford factory unit. Testing the EGR by applying vacuum caused the engine to lope so we now know ...
January 18, 2007
1999 Isuzu Trooper S 3.5L MIL Lamp on VIN: JACDJ58XXX
P0401: Insufficient EGR System Flow Detected. after replacing egr valve light & testing all wires,light comes on and goes of intermenttly with previous code present
January 18, 2007
1997 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTDX1764V
P0401: Insufficient EGR flow. This vehicle came in with a plugged EGR port at the intake. The valve also some contained carbon deposits. We cleared the maniflod and replaced the EGR valve with a Ford factory unit. Testing the EGR by applying vacuum caused the engine to lope so we now know ...
January 19, 2007
2000 Ford Expedition XLT 4.6L MIL Lamp on VIN: 1FMRU1562Y
P0401: insufficent egr flow detected. This vehicle came into my shop with a P0401 code. Checked the system and found what appeared to be a bad EGR Valve. Replaced the EGR valve, DPFE sensor and EGR valve position sensor. Test drove and everything was fine. Customer returned 2 hours later and same ...
January 19, 2007
2005 GMC Sierra 2500 HD SLE 6.6L Hesitation, Stall, MIL Lamp on VIN: 1GTHK29215
P0401: EGR Flow Insufficient Detected. this problem all started after changing fuel filters and oil and filter as part of the routine up keep.the customers complaint was intermittent mil and lack of power.as soon as the light goes out truck runs perfect.hooked up scanner pulled codes po299 po401 po...
January 21, 2007