You are offline — AutoTools still works from your device.
Code
P0411
Emissions

Injection d’air secondaire — débit incorrect

L’injection d’air secondaire ne fournit pas le bon débit.

Search another code
Advertisement

Most likely causes

  1. Pompe à air HS
  2. Clapet qui fuit

Symptoms you may notice

  • Check engine light
  • Failed emissions test

Checks to run

  1. Verify the air pump runs at cold start
  2. Inspect check valves
  3. Check the fuses

Tools you may need

Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Emissions

Advertisement
Install AutoToolsWorks offline, one tap away.
Ask the AI mechanic
Hi! Ask me anything about your car — codes, noises, parts, maintenance.
All tools