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The Ford PC/ED (powertrain control/emissions diagnostic) manual tells us that when we replace the EGR valve we need to repeat the KOEO OnDemand self test. During this test, the PCM "learns" the EGR closed position.


After any EGR changes... replacement or cleaning, I highly recommend running the KOEO on-demand self test to establish the EGR valve closed position baseline....
New to the PSD and would like to clean my EGR valve. How is this, KOEO done/what are the steps? Turn the key to the on position then off for a certain number of cycles? Then should I see something in the info center? Or is this something totally different. I saw this question asked above but did not see a reply. Maybe I missed it or it was a PM?
 
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