EGR code p0406 after installing new set of ignition coils

2003 FORD CROWN VICTORIA
131,000 MILES • 4.6L • V8
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P71GUY
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Car has new EGR valve since January 2021. Worked well, no codes. Yesterday I installed 8 new ignition coils. Car runs great, except it now shows EGR code p0406! I've only run car about 50 miles. Will code eventually go away as cars computer adjusts to new coils?
Apr 8, 2021 at 4:30 PM
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ASEMASTER6371
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Good evening,

There is no adjusting to the new coils. The code is for the Delta pressure sensor and is a very common failure. I attached the description and procedure for you below for the repair.

Roy
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Apr 8, 2021 at 5:05 PM
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P71GUY
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Hi. Thank you for your reply. I see the images but not sure what procedures I'm supposed to do.
Apr 8, 2021 at 7:18 PM
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DANNY L
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Hello, I'm Danny.

Just here to add. Here is what you need to test relating to the EGR code P0406. I've attached 2 pictures below. Hope this helps and let us know if you have any further questions on this issue. Thanks again for using 2CarPros.
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Apr 8, 2021 at 10:01 PM
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ASEMASTER6371
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I suggest changing the Feedback sensor for the code. It was a very common failure.

Roy
Apr 9, 2021 at 2:45 AM