× 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
1999 Ford Expedition Eddie Bauer 5.4L MIL Lamp on
Posted to Ford Driveability on 9/10/2008 12 Replies

Hello I have these 2 codes that seem to contradict themselves. The valve seems fine and there are no blockages in any lines and the vacuum lines appear intact. Cannot seem to find what would cause both those codes and why would it detect excessive flow and the...

12 Replies Received (View Replies)

  Related Documents & Media  1999 Ford Expedition Eddie Bauer

 
Message Closed w/FIX

car Vehicle Data

1999 Ford Expedition Eddie Bauer

VIN 1FMPU18L9X
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0401EGR System Insufficient Flow Detected
P0402Excessive EGR System Excessive Flow Detected
Message Closed w/FIX

car Vehicle Data

1999 Ford Expedition Eddie Bauer

VIN 1FMPU18L9X
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0401EGR System Insufficient Flow Detected
P0402Excessive EGR System Excessive Flow Detected