1999 Ford Expedition Eddie Bauer 5.4L MIL Lamp on
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...
FIX posted 9/17/2008
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Vehicle Data1999 Ford Expedition Eddie Bauer
Trouble Codes
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Message Closed w/FIX
Vehicle Data
1999 Ford Expedition Eddie Bauer
VIN | 1FMPU18L9X |
Engine | 5.4 L / 8 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0401 | EGR System Insufficient Flow Detected |
P0402 | Excessive EGR System Excessive Flow Detected |