Join Now
International Automotive Technicians Network

P0401 Diagnostic Trouble Code Discussion for April 2013

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
2002 Ford F-150 King Ranch 4.6L MIL Lamp on VIN: 1FTRW07682
P0401: Egr low flow. have codes p0171 and p0401 replaced bank 1 o2 and DPFE but codes keep coming back.spray carb cleaner on intake but cannot find a vacuum leak.pcv hose looks ok.i put vacuum on egr with engine running and it makes no difference how engine runs so i pulled valve ...
April 03, 2013
1997 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K7V
P0401: EGR System Insufficient Flow Detected. Hey Toyota techs, I have this camry that runs fine but has a check engine light on with code Po401(EGR Insufficient flow). The customer had the EGR valve replaced elsewhere but still has the light on. I have cleared it but it comes back. Is there a common recu...
April 03, 2013
1999 Daewoo Leganza SE 2.2L Excessive Emissions VIN: KLAVB6929X
P0401: Egr flow insufficient detected. ... this one. Customer came in with this project, cant smog it because the ck engine lamp is on. Monitored EGR function with a Waekon tester. EGR works fine and EGR lift sensor reading w/i spec. but no engine stumble when activated. Removed EGR valve and found...
April 29, 2013
1999 Daewoo Leganza SE 2.2L Excessive Emissions VIN: KLAVB6929X
P0401: Egr flow insufficient detected. ... this one. Customer came in with this project, cant smog it because the ck engine lamp is on. Monitored EGR function with a Waekon tester. EGR works fine and EGR lift sensor reading w/i spec. but no engine stumble when activated. Removed EGR valve and found...
April 30, 2013
1999 Toyota Camry LE 2.2L Stall, MIL Lamp on
P0401: EGR System Insufficient Flow Detected. First and for most let me express my thanks to all that may take time to help and guide me with this head banger! 12-28-13 car comes in with po401(egr insufficient flow) fellow tech diaged egr vacuum modulator as problem and replaced.3-1-13 car returned same c...
April 30, 2013
2002 Ford F-150 King Ranch 4.6L MIL Lamp on VIN: 1FTRW07682
P0401: Egr low flow. have codes p0171 and p0401 replaced bank 1 o2 and DPFE but codes keep coming back.spray carb cleaner on intake but cannot find a vacuum leak.pcv hose looks ok.i put vacuum on egr with engine running and it makes no difference how engine runs so i pulled valve ...
April 03, 2013
1997 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K7V
P0401: EGR System Insufficient Flow Detected. Hey Toyota techs, I have this camry that runs fine but has a check engine light on with code Po401(EGR Insufficient flow). The customer had the EGR valve replaced elsewhere but still has the light on. I have cleared it but it comes back. Is there a common recu...
April 03, 2013
1999 Daewoo Leganza SE 2.2L Excessive Emissions VIN: KLAVB6929X
P0401: Egr flow insufficient detected. ... this one. Customer came in with this project, cant smog it because the ck engine lamp is on. Monitored EGR function with a Waekon tester. EGR works fine and EGR lift sensor reading w/i spec. but no engine stumble when activated. Removed EGR valve and found...
April 29, 2013
1999 Daewoo Leganza SE 2.2L Excessive Emissions VIN: KLAVB6929X
P0401: Egr flow insufficient detected. ... this one. Customer came in with this project, cant smog it because the ck engine lamp is on. Monitored EGR function with a Waekon tester. EGR works fine and EGR lift sensor reading w/i spec. but no engine stumble when activated. Removed EGR valve and found...
April 30, 2013
1999 Toyota Camry LE 2.2L Stall, MIL Lamp on
P0401: EGR System Insufficient Flow Detected. First and for most let me express my thanks to all that may take time to help and guide me with this head banger! 12-28-13 car comes in with po401(egr insufficient flow) fellow tech diaged egr vacuum modulator as problem and replaced.3-1-13 car returned same c...
April 30, 2013