× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0401 Diagnostic Trouble Code Discussion for April 2012

Insufficient EGR Flow Detected

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2002 Acura RL Premium 3.5L Excessive Emissions VIN: JH4KA96542
P0401: EGR System Insufficient Flow Detected. ... has a P0401 and P0330. Pulled the intake and found egr passage completely clogged. I am ready to reinstall the intake but want to change the left knock sensor as the wiring all test good and it is right there under the inta...
April 02, 2012
1999 Dodge Neon High Line 2.0L MIL Lamp on VIN: 1B3ES42C6X
P0401: EGR System Malfunction. ... This neon sets the code p0401 for inssufient flow. we have relaced the egr valve. The egr valve is working properly i can apply vacume and kill the engine. The solinoid has vacume and the transducer is getting pulsing prerssure from egr valve. My problem i...
April 13, 2012
2004 Ford F-350 Super Duty XL 6.0L MIL Lamp on VIN: 1FDWF37P64
P0401: Insufficient EGR Flow Detected. Customer states vehicle runs fine, mil light came on a few days ago. I have scanned and cleared the codes, drove to see what came back, and none have. I have driven nearly fifty miles on multiple trips and truck runs fine, with no mil. Any ideas?
April 21, 2012