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Audi
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1999
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A8 Sedan (4D2) V8-3.7L (AEW)
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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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Brakes and Traction Control
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VAG Codes
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DTC 01421
DTC 01421
DTC 01421 High pressure switch valve -2- traction control -N228-
