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P0401 Diagnostic Trouble Code Discussion for July 2009

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2001 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K61
P0401: EGR System Insufficient Flow Detected. EGR has vacume while at 2500 rpms,and goes off at WOT,and shows about 22in hgs at cruise.map at engine off is 28.9 in hgs,at idle its 8.3 and 7.4 at 2500 rpms,at one time it was 10.6 at idle,then I cleaned connecters and then it went back to 8,and I feel its t...
July 03, 2009
1999 Mercury Cougar 2.5L MIL Lamp on VIN: 1ZWFT61LOX
P0401: egr flow insufficient. CODE P0401 EGR FLOW INSUFFICIENT I am thinking that the orifice which is located in the egr pipe between the dpfe hoses is at fault. It seems that the egr is working, however the dpfe voltage does not go up when the egr valve opens. even if I open the valve ma...
July 08, 2009
2003 Ford Excursion Eddie Bauer 6.0L Poor Idle Quality, Hesitation, Misfire VIN: 1FMNU44P73
P0401: Insufficient EGR Flow Detected. ... New mass air sensor. Engine also has idle stumble. No cel light on. Engine code p0266 and p0401
July 09, 2009
2000 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K8Y
P0401: EGR System Insufficient Flow Detected. reacuring code p0401 egr valve is working, vsv valve is working ,when egr valve is open with vacumm pump car will stall can comand vsv on & off .
July 16, 2009
2004 Ford F-350 Super Duty King Ranch 6.0L codes in computer VIN: 1FTWW33P54
P0401: Insufficient EGR Flow Detected. ... cam sensor. Replaced in and now truck runs, but when I drive it and check memory codes I get a p0401 insuffient flow detected, p0675 cyl. #5 glow plug circuit. When I do a koer test I get p0404 egr performance , p1408 egr ...
July 20, 2009