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Codes on an A6 2.7T

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Old 12-01-2006, 10:17 AM
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Default Codes on an A6 2.7T

Family member is getting these codes on his A6 2.7T. Info is spotty on the A6 forum. Any advice from S4 land?

1. 17965 P1557 035
Turbo/Super Charger Boost Sensor (A) Circuit
Value above upper control limit
sporadic

2. 17521 P1113 035
Bank1, sensor 1
Internal resistance too Large
sporadic

3. 16805 P0421 035
Warm Up Catalyst, Bank1
Efficiency Below Threshold

Thanks.
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