Operation CHARM
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Audi
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2009
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A4 Cabriolet (8HE) L4-2.0L Turbo (BWT)
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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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P1791
P1791
DTCs through DTC 18270/P1862
DTC 18199 / P1791:
