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P0401 Diagnostic Trouble Code Discussion for September 2010

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2001 Honda Accord EX 3.0L Hesitation, Misfire VIN: 1HGCG16511
P0401: EGR System Insufficient Flow Detected. First off tahnks for any help. I know about TSB for the EGR system. Was woundering if any one has had any luck with just cleaning the ports out and not replacing any parts (customer does not want to spend alot of money). Second can this cause the misfire codes...
September 03, 2010
1999 Honda Accord LX 3.0L MIL Lamp on VIN: IHGCG1651X
P0401: EGR System Insufficient Flow Detected. The code is for insufficient EGR flow and the EGR has been replaced, I cannot see anything blocking the port but as I remember there is another place there would be blockage in the intake, but cannot remember where to clean it out. Any help would be welcome.
September 17, 2010
2001 Mitsubishi Eclipse Spyder GT 3.0L MIL Lamp on VIN: 4A3AE85H71
P0401: Insufficient EGR Flow Detected. hello to everyone need some input on a problem with this mitsu car i have determined the cause off the egr flow code it is not getting vaccum and this is where the problem is according to alldata and vaccum diagram on car and info the vaccum comes from port A ...
September 20, 2010
1998 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5276W
P0401: Insufficient egr flow. Vehicle came in with egr insufficient flow code. The egr valve looked as if was binding or sticking when actuated. So we replaced the egr valve and ran the BG egr system cleaner on it. Vehicle ran great and tested fine so away she went. About a month later she...
September 20, 2010
2004 Chevrolet Malibu LS 3.5L MIL Lamp on VIN: 1G1ZT628X4
P0401: EGR Gas Flow Insufficient. I checked the exhuast for leaks and the muffler does have a leak at the seam. And I don't understand the map pids reading only 10 hg. when my vac gauge tells me theres a normal 17hg. I'm sorta befuddled has any body come across this problem befor? Looking for ...
September 23, 2010
1998 Mercury Mystique LS 2.5L Surge VIN: 1MELM66L2W
P0401: Egr insufficent flow detected. Customer came back 2 days later with complaints that the car has a high idle. We checked the car with the customer here, unplugged the IAC and the problem went right away. replaced Iac (ford part) and problem persisted. Symptoms only occur in drive, not in par...
September 27, 2010
2001 Honda Accord EX 3.0L Hesitation, Misfire VIN: 1HGCG16511
P0401: EGR System Insufficient Flow Detected. First off tahnks for any help. I know about TSB for the EGR system. Was woundering if any one has had any luck with just cleaning the ports out and not replacing any parts (customer does not want to spend alot of money). Second can this cause the misfire codes...
September 03, 2010
1999 Honda Accord LX 3.0L MIL Lamp on VIN: IHGCG1651X
P0401: EGR System Insufficient Flow Detected. The code is for insufficient EGR flow and the EGR has been replaced, I cannot see anything blocking the port but as I remember there is another place there would be blockage in the intake, but cannot remember where to clean it out. Any help would be welcome.
September 17, 2010
2001 Mitsubishi Eclipse Spyder GT 3.0L MIL Lamp on VIN: 4A3AE85H71
P0401: Insufficient EGR Flow Detected. hello to everyone need some input on a problem with this mitsu car i have determined the cause off the egr flow code it is not getting vaccum and this is where the problem is according to alldata and vaccum diagram on car and info the vaccum comes from port A ...
September 20, 2010
1998 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5276W
P0401: Insufficient egr flow. Vehicle came in with egr insufficient flow code. The egr valve looked as if was binding or sticking when actuated. So we replaced the egr valve and ran the BG egr system cleaner on it. Vehicle ran great and tested fine so away she went. About a month later she...
September 20, 2010
2004 Chevrolet Malibu LS 3.5L MIL Lamp on VIN: 1G1ZT628X4
P0401: EGR Gas Flow Insufficient. I checked the exhuast for leaks and the muffler does have a leak at the seam. And I don't understand the map pids reading only 10 hg. when my vac gauge tells me theres a normal 17hg. I'm sorta befuddled has any body come across this problem befor? Looking for ...
September 23, 2010
1998 Mercury Mystique LS 2.5L Surge VIN: 1MELM66L2W
P0401: Egr insufficent flow detected. Customer came back 2 days later with complaints that the car has a high idle. We checked the car with the customer here, unplugged the IAC and the problem went right away. replaced Iac (ford part) and problem persisted. Symptoms only occur in drive, not in par...
September 27, 2010