Idiot Light Came On Right After 100,000 Miles (100,210 To Be Exact) I Am In The Process Of Getting A New 2004 F150 And Using My Truck As A Trade In ...my Trade In Truck Is A 1998 F15o Lariat Fully Equipped ...
F150 Manual Says To Wait Till I Cycle Through 3 Tanks Of Gas To Be Sure Of Gas Not Having Water In It ...seems To Be Primarilly Connected With Emmissions System (good Ol' California ) Could This Be A Cue From The Computer? After 100,000 Miles The Light Automatically Goes On ??? Is There Anyway To Reboot The Signal Or Do I Have To Face Fords Diagnostic Feedback..i Don't Want To Take A Unrealized Penalty For Something That Could Be Automatic...
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It could be any one of dozens of reasons. Put a code reader on it and find out why. Autozone will read it for free.

 

Hello Bro this is okladrop I had the same thing on my 97 F-150 take it to Auto Zone they will check it out for free.

 

Thanks For Info ... Warning Lite Turned Out To Be The Culprit ....got A Good
Trade In Value And I Now Am Driving A New 2004 Fx4....again Thanks..