AutoCodes – Generic – P0150

P0150 Code - O2 Sensor Circuit Malfunction Bank 2 Sensor 1

Quick Answer

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0150 indicates O2 Sensor Circuit Malfunction Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 53,880

How popular is this code, among other codes? Medium

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0150 Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P0150 - O2 Sensor Circuit Malfunction Bank 2 Sensor 1 - AutoCodes.com — P0150 Code - O2 Sensor Circuit Malfunction Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0150?

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Replacing the O2 Sensor 1 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0150 code?

Need more information on how to fix the P0150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0150 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0150 Ford — O2 Sensor Circuit Malfunction Bank 2 Sensor 1
P0150 Infiniti — Air Fuel Ratio Circuit Bank 2 Sensor 1
P0150 Infiniti — O2 Sensor Circuit Malfunction Bank 2 Sensor 1
P0150 Mercedes-Benz — O2 Sensor Circuit Malfunction Bank 2 Sensor 1
P0150 Nissan — Air Fuel Ratio Circuit Bank 2 Sensor 1
P0150 Nissan — O2 Sensor Circuit Malfunction Bank 2 Sensor 1

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0150 Code

1. What does the OBDII code P0150 mean?

P0150 indicates a malfunction in the oxygen sensor circuit for Bank 2 Sensor 1, which is located upstream of the catalytic converter on the engine's second bank.

2. What are the common symptoms of code P0150?

Symptoms include poor fuel efficiency, rough idling, reduced engine performance, and possibly an illuminated check engine light.

3. What causes the P0150 code to appear?

Common causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine control module (ECM).

4. How can I diagnose a P0150 code?

Start by inspecting the oxygen sensor and its wiring for damage. Use a multimeter or scan tool to test the sensor's voltage and resistance for proper functionality.

5. Can a dirty air filter cause the P0150 code?

A dirty air filter is unlikely to directly cause P0150, but it can contribute to poor air-fuel mixture, which could affect oxygen sensor readings.

6. How do I fix the P0150 code?

Repairs may include replacing the faulty oxygen sensor, repairing or replacing damaged wiring or connectors, or addressing any exhaust leaks.

7. Is it safe to drive with a P0150 code?

Driving with a P0150 code is not recommended as it can lead to poor fuel efficiency and potential damage to the catalytic converter over time.

8. How much does it cost to fix a P0150 code?

The cost can range from $150 to $400 depending on whether you need to replace the oxygen sensor or perform additional repairs like fixing wiring or exhaust leaks.

9. Can a bad catalytic converter trigger the P0150 code?

While a bad catalytic converter is not a primary cause, it can lead to abnormal oxygen sensor readings that may contribute to the code.

10. How can I prevent the P0150 code from occurring again?

Regular maintenance, including timely oxygen sensor replacements, inspecting wiring, and fixing exhaust leaks promptly, can help prevent the P0150 code.