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2002
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A6 Quattro Sedan (4B2) V6-3.0L (AVK)
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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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P Code Charts
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P1820
P1820
DTC 18227 / P1819, 18228 / P1820
1) First check connectors for corrosion or water damage, replace if necessary. With DTCs recorded it is important to check the 16-pin connector between valve body and wiring harness.