I have a p0400 code but my light is on and off could it just be a bad Air or Map sen.

Question

Is it something I can fix fast my car runs good if i look it up it comes back as a fuse but i just put all new fuses in and had it in the shop and still the same thing

Answer 1

Hi there

This code is for a problem with the egr, not the map or mass air flow sensor. You need to check the egr system. Vacuum to the egr valve and also make sure the egr port isn't plugged on it. Sometimes if it's plugged it will prevent egr flow and the code will be set.