I have the same problem on a B6 2.4 , with the same code. I have had fixed a leaky pipe or two and it still does it.
If I clear the codes the engine runs awful on idle for a few miles, then is fine again. Then the codes come in and 100 miles later I get the engine light with P0171 and P0174...
Hi
bought a 2.4 V6 over the winter and gradually fettling it to take down to La Sarthe in June, on I think my 25th trip...
No Tom this year but Oliver Jarvis gets my support
All the best
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