What does a diagnostics code of p0405 typically mean...My check engine light came on shortly after I got gas today and scanned and came back with this code...

Asked by Oct 27, 2014 at 05:39 PM about the 2010 Mercury Milan I4 Premier

Question type: Maintenance & Repair

3 Answers

88,665

EGR problem with flow, you most likely will have to replace the egr valve unless some carbon has plugged up the egr feed passage.

Best Answer

Is that expensive

88,665

Depending where you get the part, the range is anywhere from 85 to 158 bucks, then if you can't do it yourself then there is labor to replace it and reset the ECM.

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