Failed or aged oxygen sensor; Damaged wiring or connector; Exhaust leak near the sensor; Sensor contaminated by oil or coolant; Engine computer fault (rare).

How much does it cost to fix P0150?

Usually 60–350 € at an independent workshop in Europe, depending on which part is at fault.

P0150 Oxygen sensor circuit (bank 2 sensor 1)

What P0150 means

The front oxygen sensor on each bank measures the oxygen in the exhaust so the engine computer can control the mixture. P0150 means the signal from the bank 2 front sensor (the side without cylinder 1) is faulty or out of range. Fuel control on that bank becomes less accurate.

P0150 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.

At a glance

Severity: Medium
Typical repair cost: 60–350 €
Workshop time: 0.3–1.5 h
Repair difficulty: Easy
DIY possible: Yes
Check engine light: Yes
Affects emissions test: Yes

Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.

Symptoms

Check engine light on
Higher fuel consumption
Possible rough idle
Technical inspection failure for emissions

Common causes

Failed or aged oxygen sensor
Damaged wiring or connector
Exhaust leak near the sensor
Sensor contaminated by oil or coolant
Engine computer fault (rare)

Can I keep driving with P0150?

You can drive, but have it repaired within one or two weeks.

What to check first

Check the sensor wiring and connector for damage
Look for exhaust leaks near the sensor
Watch the sensor signal in live data with a warm engine
Replace the sensor if its signal is faulty

Related codes

Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
Updated: 2026-10-24