Hi all,
I am looking for some help from anyone would spare some time. My 2000 Maxima GLE sevice engine soon came on, so I took it to the Autozone have the code read and it had the P0400, I had replaced the EGR valve, cleaned all those tubes out, reset the code, but about over 100 miles later the service engine soon came back on. I got the code read again at the Autozone and it read out the same code P0400. Any expert out there has any idea what I should do next? by the way the car is always running really good. Thanks