TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
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If channel 2 (black arrow) is over 70mbar less than channel 4 (white arrow):
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Symptom indicates the MAF sensor requires replacement:
If No leaks are found in the pressure side air duct and additional checks have been performed with No cause found and:
If the DTCs shown still exist.
