Toyota Corolla Verso - Error code P0400 EGR valve - daveyjp If you google 'dirty EGR valve' and look at some of the images you will see that the problem will be.

Question:I've already done a lot of work to a 2000 3.3-liter Nissan Frontier Crew Cab. It runs bad and has two codes, P0300 and P0400. I spoke to a mechanic who thought I should change the ...