so im getting a P0401 code on my 98 celica gt and ive replaced the egr valve, vacuum modulator, and vsv and still get the code
i have cleaned the intake side port of egr but im curious of where the exhaust enters through the head then to the egr pipe so far i have noticed 1 port but i dont know if there are more, cause they may be clogged here is a picture of a blocke with the exhaust ports and the red is where the egr flows. please anybody know anything?