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Code

P0440

Evaporative emissions

Défaut système EVAP

Le système de vapeurs a un défaut.

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Most likely causes

Bouchon desserré
Fuite EVAP
Vanne de purge

Symptoms you may notice

Check engine light

Checks to run

Tighten the fuel cap
Smoke test
Test the purge valve

Tools you may need

Smoke machine

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

Related codes in Evaporative emissions

Petite fuite dans le système EVAP

Défaut circuit vanne d’aération EVAP

Grande fuite dans le système EVAP

Très petite fuite EVAP

Capteur pression EVAP — signal haut

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