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I need to know what the P1423 code means for a BMW?

Vehicle: BMW

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Hi there,

This code usually means there is a problem with the air pump, here is some more information for you.

P1423 BMW - Secondary Air Injection System Bank 1 Insufficient Flow Detected
Read more: https://www.autocodes.com/p1423_bmw.html

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asked Apr 1, 2017 by Sam

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