Q: how do you change +or clean the egr?
on 1997 Nissan Maxima

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
failed emissions - cdes p0400+p0300+p0443
(2) Answers
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i agree with mastertech. the egr could be causing code po300 but not the evap,seek a proper diag and est as to not waste time and $
there is lot more to the egr code, 400 than just replacing the valve. you need to have it checked to verify. there is a lot more than the valve in the egr system
300 is a random missfire
443 is an evap code.

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