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2004
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A6 Quattro Wagon (4B5) 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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Manufacturer Code Charts
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Brakes and Traction Control
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Electronic Stabilization Program (ESP) - Bosch 5.3
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VAG Codes
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DTC 01421
DTC 01421
DTC01420 High Pressure Switch Valve -1- Traction Control-N227- / DTC01421 High Pressure Switch Valve -2- For Traction Control -N228-:
