Is this part need to be replaced after light goes off after adding Lucas gas treatment?

Question

I went to Advanced Auto Parts and they gave me the analysis of this code P0402-The car runs great until I had Firestone rotate my tires. While in drive when I come to red light I noticed the car to be missing-so I thought it was a wire or plug-then I found out it was this sensor.
Please respond as soon as you can.
Thanks

Answer 1

HI there

This code is for excessive egr flow. Usually this indicates the egr valve is sticking open. This would not be related to the tire rotation. Since the light is out, it's not something to worry about at this time. If the light returns with the same code then the egr system will have to be inspected.

P0402 MERCURY - Exhaust Gas Recirculation Flow Excessive Detected

Read more: https://www.autocodes.com/p0402_mercury.html