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					Originally Posted by stateofidleness  Vacuum leak? I had these two codes off and on forever... dug into an AOS replacement recently and found one of the brittle hard plastic vacuum lines to the changeover valve completely broke off and just laying there. It's hard to see because it's sorta underneath the passenger side intake manifold. 
 
 
 Worth looking at all your vacuum hoses, and the evap canister as well.
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thanks stateofidle..
actually I m trying to find the issue STILLL  ....WTF !! I have replaced  all small vacuum hoses under  drivers intake 
 new hoses , vacuum reservoir , change over valve . check valve ..  new intake gaskets on that side 
new oil fill tube ,  repair oil dipstick tube  - done several smoke tests   last one seem GOOD 
THIS MORNING DRIVING BACK AND FORTH  now same two codes came back  
OXYGEN SENSING ...
I think need to look passenger intake underneath for problems   or new FPR  
my fuel trim nunbers   STFT  0.1 to 5.7  LTFT  - 10.4  both banks bank 2 always a bit higher...