Engine and gearbox (P)
P0130: Oxygen sensor circuit malfunction
The upstream oxygen sensor is not providing a plausible or active signal. This affects the engine's ability to manage fuel efficiently.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Increased fuel consumption
- Rough idle
- Check engine light on
Common causes
- Sensor ageing
- Wiring damage
- Exhaust leak
How to check it yourself
- Check sensor response on live data
- Inspect wiring for damage
- Examine exhaust for leaks
Can I keep driving?
The car can still be driven, but fuel efficiency may be reduced.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer