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P0401 Diagnostic Trouble Code Discussion for March 2005

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Audi A6 2.8L MIL Lamp on VIN: WAUGA84A1T
P0401: EGR insuffiecent flow. The egr vale works, the measuring blocks show the egr temp sensor reaching the correct temperature in the correct amount of time. Anyone have suggestions or a been there? Best Regards, Bill
March 09, 2005
1997 Honda Accord EX 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... lunch break and sure can use some help.The customer has been very patient and an old friend.The MIL will come on intermittently between one day to a week with one or two codes (P0118-coolant temp circuit high input(open) and sometime with P0524-no definiti...
March 09, 2005
1997 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K6V
P0401: EGR System Insufficient Flow Detected. Correct egr restriction and vacuum problem. Engine now has sufficient flow. however still setting po401 code. Has any one seen map fail within range causing po401
March 09, 2005
1999 Acura TL 3.2L MIL Lamp on VIN: JH4UA364XW
P0401: EGR System Insufficient Flow Detected. car came in with check engine light on.code po401 insufficient egr flow.when full vacuum is applied at idle engine bogs down but does not die.when static testing (o"in vacuum voltge 1.30. 1"in vacuum volts 1.30.2"in vacuum volts 1.52.3"vacuum v...
March 14, 2005
1999 Ford F-150 XL 4.2L Cuts out, Misfire, MIL Lamp on VIN: 2FTZF1723X
P0401: cont. memory egr insufficient flow detected. vehicle showed no codes in koeo or koer, vehicle runs fine with egr valve vaccuum hose unplugged and blocked off. We replaced the egr solenoid,dpfe and checked the orifice restriction at the dpfe tubes. We cleaned the egr passages and inspected the egr valve.W...
March 21, 2005
1998 Toyota Camry CE 2.2L MIL Lamp on VIN: JT2BG8K2W0
P0401: EGR System Insufficient Flow Detected. after seeing the code about temp and checking the temp. range i blocked the front of the raidiator and cleared the code and drove for 25 miles the temp range was about 210 and the light never came on so i decieded that it needed a thermostate. after i change i...
March 21, 2005
1999 Honda Accord LX 3.0L MIL Lamp on VIN: 1HGCG1646X
P0401: EGR System Insufficient Flow Detected. Thank you for your time. I am having a problem getting the check engine light to stay off. See history. What I am needing to know is where exactly is this thing carboning up and do I have to pull the intake to clean it properly? Or is there something I am miss...
March 22, 2005
1998 Oldsmobile LSS 3.8L MIL Lamp on
P0401: Insufficient EGR Flow Detected. ... mil light on, had random misfire code. found misfire and it ok after the tune up. plugs,wires, pcv vlace and motorvac was done, no mil light after the repair. week later mil light is on again and has code p0401 insufficent egr flow detected. code was reset...
March 28, 2005
1998 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG2ZK7W
P0401: EGR System Insufficient Flow Detected. This vehicle puts out a low egr flow code on a regular basis, even though the egr system appears to be working fine. We have replaced the egr valve, modulator and solenoid (all oe parts) with no positive results. In testing the map sensor, it passes all tests ...
March 29, 2005
1998 Toyota RAV4 2.0L test monitors VIN: JT3HP10V6W
P0401: EGR System Insufficient Flow Detected. ... IL emission test it had prevoiusly come in with a P0401 and a failed VSV was found thanks to the many posts in the repair section. The vehicle was returned to the customer and driven @ 250 miles, customer returned and we verified no codes and all readiness...
March 29, 2005