Code
P1131
Fuel / Air
Sonde — signal pauvre en boucle fermée
Le moteur tourne pauvre en boucle fermée.
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Most likely causes
- Fuite de vide
- Pression de carburant
Symptoms you may notice
- Check engine light
- Rough idle
- Poor economy
Checks to run
- Smoke test intake
- Check fuel pressure
- Inspect exhaust
Tools you may need
Smoke machine
Fuel pressure gauge
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.