1997 Toyota Camry Q&A

1997 Toyota Camry Question: i have a 1997 toyota camry the code that i get is po401 egr flow insufficcient,

i replaced the egr valve with a new one and its good for about 100 miles then it come back on what do i do -
Answer 1
Ports of EGR need cleaned. -
Answer 2
clean EGR ports -