Code
P0031
Emissions
Chauffage sonde bas — Rangée 1 Capteur 1
Le circuit de chauffage de la sonde lit trop bas.
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Most likely causes
- Câblage court-circuité
- Sonde défectueuse
Symptoms you may notice
- Check engine light
Checks to run
- Measure heater resistance
- Check for shorts
- Test the driver
Tools you may need
Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.