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P0401 Diagnostic Trouble Code Discussion for December 2004

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2000 Chevrolet Impala 3.4L MIL Lamp on VIN: ZG1WF55E4Y
P0401: Insufficient EGR Flow Detected. Car came in with po401. Relaced EGR, no help. Replaced MAP sensor, no help. Ckecked for blockage in EGR port, found none. When comand EGR open with scaner Idle goes to poor as normal, and MAP voltage goes up as normal. Can find no blockage in pipe going to EGR...
December 01, 2004
1996 Toyota Camry DX 2.2L MIL Lamp on VIN: 4T1BG12KOT
P0401: EGR System Insufficient Flow Detected. ... of work here. I got this 1996 Toyota Camry that I had to change the engine because one of the connecting rods got bent from driving through a flood. Ever since the engine replacement, the MIL comes on, not right away, but after driving a few days & set...
December 16, 2004
2000 Chevrolet K2500 7.4L MIL Lamp on VIN: 1GCGK24J4Y
P0401: Insufficient EGR Flow Detected. G.M. Techs This truck has had this problem in the past with the same codes. The last time I had it the repairs were done and I ran the monitors with all passing on my Tech2.. This was over 2 months ago.. freeze frame data shows 1 failure trip on the O2s and 2...
December 20, 2004
1999 Ford F-150 4.6L Misfire VIN: B676791149
... SHOP ,CAME in with these two codes ,i change the egr sensor and the van work find now the van is back again and code p1000 is stored again .does any one have any info on this code or any diagrams or reading material .is this a regular problem on these vehi...
December 23, 2004
1999 Ford F-150 4.6L Misfire VIN: B676791149
... SHOP ,CAME in with these two codes ,i change the egr sensor and the van work find now the van is back again and code p1000 is stored again .does any one have any info on this code or any diagrams or reading material .is this a regular problem on these vehi...
December 24, 2004
1996 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMDU32X1T
P0401: Insufficient EGR Flow Detected. Vehicle came in with two complaints: rough idle and check engine lite on. Scanned. Two codes identified. Cylinder 2 misfire. Ckd plugs, like new, but swapped. Swapped like-new wires--still cyl 2 misfire. Compression test on #2, #1 and #5 cyl--all 150 to 155 ps...
December 30, 2004