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Those two codes mean the car is running lean (more air than fuel) you need to check the fuel pressure (which you are doing), if the fuel pressure checks fine you need to look for vacuum leaks. A common place to look would be the intake manifold gasket and the throttle body gaskets.
The fuel pressure should be at 45 psi when the key is at ON, then it should go down to 38psi when the car is turned on. Give or take 2PSI.
2003 Jetta left rear window blue plastic part of the