A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Fault Codes

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Old Apr 11, 2000 | 02:04 AM
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Herbert W.'s Avatar
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Default Fault Codes

My chipped 1.8T has recently registered the following VAG fault codes:

Boost pressure control solenoid--N75
ACF solenoid

Does anyone know if these solenoids are controlled by the ECU, or are they simply faulty mechanical parts that can be replaced? Thanks.
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Old Apr 11, 2000 | 06:51 AM
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Jake's Avatar
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Re: Fault Codes - Yes and yes.
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