P0150: Oxygen sensor circuit malfunction (Bank 2 Sensor 1)
Drive carefully. Get it checked within a week or two.
Can I drive with P0150?
Yes, but drive carefully and get it checked soon. Upstream Bank 2 O2 sensor signal erratic; fuel mixture accuracy is degraded.
What does P0150 mean?
P0150 stands for O2 Sensor Circuit Malfunction (Bank 2, Sensor 1).
Symptoms you may notice
- Drop in gas mileage by 10% to 15%
- Slight hesitation or sluggish response when accelerating
- Check engine light illuminated
How much does it cost to fix?
Repair costs for code P0150 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Aged or failed Bank 2 upstream oxygen sensor
- Exhaust leak near Bank 2 manifold
- Damaged sensor wiring harness
- Oil contamination from valve cover leak
What to do next
- Check Bank 2 sensor wiring for contact with the exhaust pipe.
- Inspect Bank 2 exhaust manifold for cracks.
- Replace Bank 2 Sensor 1 oxygen sensor.
Last updated: October 2026
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General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0150 triggers when the primary air-fuel sensor on Bank 2 provides irregular voltage. The vehicle remains drivable, though fuel consumption will increase.