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P0401 Diagnostic Trouble Code Discussion for February 2010

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2003 Ford Expedition XLT 5.4L Poor Idle Quality, Misfire VIN: 1FMFU188L8
P0401: Insufficient EGR Flow Detected (ESM System). ... use. Initial complaint from customer was a rough idle, and rough acceleration. New customer, so I had no maintenance history and customer didn't know either. I pulled codes and retrieved P0401-EGR Insufficient Flow. I foun...
February 04, 2010
2000 Acura RL Premium 3.5L MIL Lamp on VIN: JH4KA9659Y
P0401: EGR System Insufficient Flow Detected. I have determined the EGR ports are clogged, however my tech is having trouble removing the upper intake plenum. I looked some but not familiar with these. Alldata shows a picture but no instructions. Do you have to remove the whole assembly or can you seperat...
February 10, 2010
1997 Honda Civic HX 1.6L MIL Lamp on VIN: 1HGEJ7122V
P0401: EGR System Insufficient Flow Detected. ... a p1491, EGR lift insufficient. We tested the lift sensor and found inaccurate reading to lift sensor position, so we replaced the EGR valve. A week later the car returned with a p0401, EGR insufficent flow. We removed t...
February 11, 2010
2000 Toyota Camry LE 2.2L MIL Lamp on VIN: 4T1BG22K3Y
P0401: EGR System Insufficient Flow Detected. ... Toyota Camry LE came in mill on code P0401. EGR insufficient flow. All EGR components check OK. Please assist Thanks Henry
February 22, 2010
1997 Toyota RAV4 2.0L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: JT3HP10V8V
P0401: EGR System Insufficient Flow Detected. customer says that when stopping for a light sometimes that the engine runs rough or stalls then the mil light comes on.The car then runs good for a while.
February 23, 2010
1998 Honda Prelude 2.2L Hesitation, Stall VIN: JHMBB6242W
P0401: EGR System Insufficient Flow Detected. ... lite pulled codes and found p0401 and p0420 customer opted to have cat repaired first came back two weeks latter for E G R valve. the valve was replaced pulled the plugs on intake manfolid and cleaned all egr ports all ports where cloged closed put it back...
February 24, 2010