P0134Severity: Medium
P0134 – Oxygen Sensor No Activity (Bank 1 Sensor 1)
No activity detected from the upstream O2 sensor.
What it means
No expected signal comes from the pre-catalyst oxygen sensor. The sensor may not reach operating temperature or its circuit is open.
Symptoms
- High fuel use
- Rough idle
- Check-engine light
Common causes
- Faulty O2 sensor
- Heater circuit issue
- Open wiring
- Exhaust leak
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Frequently asked questions
What does trouble code P0134 mean?
P0134 – Oxygen Sensor No Activity (Bank 1 Sensor 1). No expected signal comes from the pre-catalyst oxygen sensor. The sensor may not reach operating temperature or its circuit is open.
Can I drive with a P0134 code?
You can usually drive short distances, but it's best to have it checked before it gets worse.