P0446,p0449,p0101 codes on 99 nbs

juanr_08

Member
Apr 2, 2012
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Ok guys so I have these codes pop up on my truck, so I went ahead and replaced the vent valve by fuel tank, also replaced, purge valve on top of engine, as well as cleaned maf sensor, after I cleared codes, they came back up, is there any other problem than just this?