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Audi
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2000
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A6 Quattro Wagon (4B5) V6-2.8L (ATQ)
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Manufacturer Code Charts
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Engine Control System
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DTC 16805
DTC 16805
DTC P0420 - P0421:
