A little embarrassed about a problem I have had getting the Emissions computer to reset for emissions testing in Maryland. I tried everything the testing station suggested, but could not get the codes to reset, for readiness for emissions testing. I surrendered after 5 or 6 trips to the testing station, and took it to my very trusted mechanic, thinking I had a bad ECU, and he would need to replace it. I would have done it myself, but figured I would not be able to re-program it myself, so would rely on my mechanic.

Got the car back, fixed for less than $50 (they did other maintenance work as well). Guess what it was?

It was a blown fuse! This is the second time this 2000 Explorer XLT, 5.0 has me stumped and it was just a fuse - first time was tow-hitch lighting.

So now, no matter what, I will check all the fuses first! Regardless of the problem - ok, maybe only a last resort when I have a flat tire

Just thought I would share, and help others avoid the frustration of multiple trips to the emissions testing station to be told the vehicle was not ready.

Happy trucking,
Bob
2000 Ford Explorer XLT, 5.0L "Bessy Jr."

 

Interesting, thanks for sharing!

-Rod

 

Yeah, that would be the KAM/Keep alive memory fuse for tthe ECU.... On some Fords the KAM & horn are wired to the same fuse, so checking the fuse is as simple as seeing if the horn works.