P0150 — 02 Sensor Circuit Malfunction (Bank 2 Sensor 1)
Category: Powertrain Severity: High
Updated:
DTC code P0150 means: 02 Sensor Circuit Malfunction (Bank 2 Sensor 1). It falls under the "Powertrain" category, with an estimated severity of High. Common causes include faulty oxygen (O2) sensor (Bank 2 Sensor 1), wiring or connector damage/corrosion and exhaust leak near the sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty oxygen (O2) sensor (Bank 2 Sensor 1)
- Wiring or connector damage/corrosion
- Exhaust leak near the sensor
- Blown fuse (if heater-related)
Symptoms
- Check engine light on
- Increased fuel consumption
- Rough idle in some cases
- Possible failed emissions test
How to diagnose it step by step
- Identify bank 2 (the side without cylinder 1).
- Check the sensor connector and wiring.
- Watch the signal.
- Replace the sensor.
How to fix it
Inspect the wiring and connector of the Bank 2 Sensor 1 oxygen sensor for damage or corrosion, and check for exhaust leaks nearby. If both are fine, the sensor itself is most likely faulty and should be replaced — O2 sensors wear out over time and don't have a simple repair.
Estimated repair cost
$100–300.
Frequently asked questions
What does DTC code P0150 mean?
02 Sensor Circuit Malfunction (Bank 2 Sensor 1).
Is code P0150 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0150?
Yes, it is safe to drive.
Related codes
P0151 P0153 P0155 P0156 P0157 P0141 P0140 P0161 P0139 P0138
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