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What is P1423 code on a1999 Volkswagen Passat V6, what does this mean?

Vehicle: 1999 Volkswagen Passat V6

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HI there

This code means secondary air injection on bank 1 to small.

Usually this is the result of a faulty air pump or air pump circuit. It can also be caused by a bad circuit to the air pump.
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P1423 VOLKSWAGEN - Bank 1 Secondary Air Injection System Output Too Small
Read more: https://www.autocodes.com/p1423_volkswagen.html

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