How to fix a P0402 code on a 2002 Ford Mustang?

Question

I replaced the EGR valve, cleared the code and the Service Engine Soon light came back on a couple of days later.

Answer 1

Hi there,

If replacing the EGR hasn't solved the issue, it's likely a wiring problem. Here is some more info for you.

P0402 FORD - Exhaust Gas Recirculation Flow Excessive Detected

Read more: https://www.autocodes.com/p0402_ford.html