CODE: P0401-EGR INSUFFICIENT AIR FLOW
1996 Isuzu Trooper • 6 cylinder 4WD Automatic • 194,000 miles
CODE: 0401 says that I have insufficient airflow in the EGR area. I have had this code for almost a year. I have replaced the EGR valve with a new one, ran a number of different cleaners through the EGR system, cleaned the EGR pipe, checked the EVAP container, checked for bad vacuum hoses and have been saying my prayers. Still the code is there and I now think that maybe it is a bad or intermittent electrical part. Maybe it is the VSV-vacuum switch valve? It is an AC Delco Remy 201. It runs about $20.00. Maybe the ECM is bad in putting out EGR signals? Does anyone have any other ideas? My gas mileage is down to about 10 mpg and I am going through oil like crazy. Thanks.
April 8, 2011.
April 8, 2011.
That's most likely just a plugged up passage through the intake manifold. There is a passage that runs from the EGR valve itself to the intake manifold somewhere. Most of them narrow down in one spot and that spot build up with carbon and it has to be manually dug out. You may have to remove the throttle body to access it.
Thanks, my guess has been that it is still a plugged area, I just did not know where it might be, but what you say makes sense.
I Need to Find a 81 Subaru Brat Accident / Body Repair /Restorer. My 1981 Subaru Brat was in a accident and I am Looking to find a Subaru Specialist to Help Repair my car. The biggest ...
1 answer • 1981 Subaru Brat • 286,000 miles
Needing to know what body parts are interchangable between the coupe and sedan. the coupe is 2001 and the sedan is 2003 i have a wrecked 2003 and just picked up a 2001 and wanted to ...
1 answer • 2001 Chevrolet Cavalier
I have a 2001 bmw 325i that runs awesome and has almost a new frame with new bushings and shocks but the body is aweful and I have a 1997 bmw 318i that has an awesome body but a bad ...
1 answer • 2001 BMW 325i • 100,000 miles
My drivers door got hit, so i replaced it with another drove from a salvage yard , correct color match. but now the door body line does not match up like the orginal door did.
5 answers • 2005 Chevrolet Silverado • 65,000 miles