I had these codes and it was do to incorrect positioning of the AOS to TB tube. Connection of the tube on the TB fitting.
With a secure connection, vacuum was gone, codes were gone.
I did break down and replace the tube when I started to see some oil weeping out at the TB side of the tube.
Then I replaced AOS as part of preventative maintenance
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2002 S - old school third pedal
Seal Grey
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