The P0406 code in a 2003 Ford Escape indicates a problem with the Exhaust Gas Recirculation (EGR) system.
So, this code is common when the catalytic converter needs to be replaced due to partial clogging. Here are instructions on how to do so in the images below. Check out the images (below). Please let us know what happens.
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May 6, 2023 at 12:08 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.