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    2004 A3 VCDS error code

    Hi everyone, My Audi A3 2.0 TDI is displaying a yellow engine warning light with the following error code on the diagnostics, I am thinking its a contaminated EGR valve or faulty oxygen sensor but not sure. I have also noticed the air intake filter looks a bit dirty so thought it could be that...
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    Audi A3 Insufficient air flow fault code Po401

    Hi, I have just seen the engine management light come on and after running the VCDS software it came back with the following code, can anyone advise what could be wrong and could it affect my engine and fuel economy? many thanks 1 Fault Found: 16785 - EGR System P0401 - 000 - Insufficient...
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