Code
P0134
Emissions
Sonde à oxygène sans activité — Rangée 1 Capteur 1
La sonde amont ne change jamais de tension.
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Most likely causes
- Sonde défectueuse
- Câblage
Symptoms you may notice
- Check engine light
- Runs rich longer
- Worse fuel economy
Checks to run
- Watch O2 voltage at 2,500 rpm for switching
- Test the sensor
- Check wiring
Tools you may need
OBD-II scanner
Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.