P1423 - i have a 2001 audi a4 quattro. and this code keeps coming up when the car is put on a computer. p1423....HELP

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Carguy1 · Answer 1 · 2018-09-19T18:26:11+0000

Hi there,

This code indicates an issue with the secondary air injection system. Here is some info for you.

P1423 AUDI - Bank 1 Secondary Air Injection System Output Too Small

Read more: https://www.autocodes.com/p1423_audi.html