failed emissions - cdes p0400+p0300+p0443
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1997 Nissan Maxima
Question: how do you change +or clean the egr?
Answer #1mastertech6371 October 11, 2012, 20:08Master
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.
Answer #2Greg's Orange Auto (8341 Answers) , Orange, CA - (714) 361-9355globalhelper October 12, 2012, 06:40Master
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 $