× 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 May 2007

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
1996 Honda Accord EX 2.7L MIL Lamp on VIN: IHGCE6679T
P0401: EGR System Insufficient Flow Detected. ... P0401 and P0725 the ignition coil took care of the 725 code but i replace egr valve and it came back on right after she left the shop. So to CYA i put a vacume solenoid on and cleaned the egr tube.Should have done that before but hind sight 20/20. Either w...
May 05, 2007
2001 Pontiac Bonneville SSEi 3.8L MIL Lamp on VIN: 1G2HZ541X1
P0401: Insufficient EGR Flow Detected. ... it has been to two different GM dealers, multiple times for code P0401. The light will come about every 7-10 days and if left on will turn off some times and then reappear. They have replaced EGR twice, clened the passages, even pulled the lower intake man...
May 18, 2007
1997 Acura CL 3.0L MIL Lamp on VIN: 19UYA2258V
P0401: EGR System Insufficient Flow Detected. Hello Car keeps setting the code for EGR flow problem. EGR valve was replaced and we cleaned down the EGR ports with carb spray. We checked passages with car running and have good exhaust coming from one port and vacuum created on other port. Can't believe tha...
May 21, 2007