What does code P1423 mean on Audi vehicles?
Insufficient secondary air injection flow detected on bank 1.
OBD-II Code Audi
P1423 — Audi — Secondary Air Injection System Bank 1 Flow Too Low
Insufficient secondary air injection flow detected on bank 1.
Common symptoms
- Increased emissions.
Possible causes
- Faulty pump or valve.
Initial recommendation
Inspect secondary air injection system.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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