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Engine-Codes – Nissan – P0139 2006 Nissan Altima Sedan

P0139 2006 Nissan Altima Sedan Code - HO2S12 Slow Response

Quick Answer

The diagnostic trouble code P0139 for a 2006 Nissan Altima Sedan refers to a potential issue with the HO2S12 sensor, also known as the heated oxygen sensor located after the catalytic converter in bank 1. Common causes include Faulty HO2S12 sensor, Wiring or connector issues, Exhaust leaks near the sensor. 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
P0139 2006 Nissan Altima Sedan indicates HO2S12 Slow Response.
Common causes
Common causes include Faulty HO2S12 sensor, Wiring or connector issues, Exhaust leaks near the sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0139 2006 Nissan Altima Sedan Description

The diagnostic trouble code P0139 for a 2006 Nissan Altima Sedan refers to a potential issue with the HO2S12 sensor, also known as the heated oxygen sensor located after the catalytic converter in bank 1. The code specifically indicates a slow response from this sensor, which can have significant implications for the vehicle's performance and emissions control system.

OBDII Code P0139 2006 Nissan Altima Sedan - HO2S12 Slow Response
P0139 2006 Nissan Altima Sedan Code - HO2S12 Slow Response

Common Causes of P0139 2006 Nissan Altima Sedan

  1. Faulty HO2S12 sensor
  2. Wiring or connector issues
  3. Exhaust leaks near the sensor
  4. Malfunctioning ECM
  5. Contaminated sensor due to oil or coolant leaks

Symptoms of P0139 2006 Nissan Altima Sedan

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Increased emissions levels

How to Fix P0139 2006 Nissan Altima Sedan

  1. Use an OBD-II scanner to confirm the P0139 code and identify the specific issue with the HO2S12 sensor.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the sensor's response time and voltage output using a multimeter to determine if it is functioning correctly.
  4. Replace the HO2S12 sensor if it is found to be faulty, ensuring proper installation and connection.
  5. Clear the diagnostic trouble codes, reset the ECM, and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0139 2006 Nissan Altima Sedan

The typical repair costs for addressing a P0139 code on a 2006 Nissan Altima Sedan can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. It's recommended to inquire about local rates for a more accurate cost estimate.

What does this mean?

Tech Notes for P0139 2006 Nissan Altima Sedan

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.

When is the Code Detected?

The P0139 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time.

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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 P0139 2006 Nissan Altima Sedan Code

1. What does the OBDII code P0139 on a 2006 Nissan Altima Sedan indicate?

- The code P0139 specifically refers to a slow response by the HO2S12 sensor, also known as the downstream oxygen sensor.

2. What are the common symptoms of a P0139 code in a 2006 Nissan Altima Sedan?

- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light.

3. What are the possible causes of a P0139 code in a 2006 Nissan Altima Sedan?

- Potential causes include a faulty HO2S12 sensor, wiring issues, exhaust leaks, engine misfires, or a problem with the catalytic converter.

4. How can I diagnose the source of a P0139 code in a 2006 Nissan Altima Sedan?

- Diagnosing the issue involves checking the downstream oxygen sensor's wiring, testing its response time, inspecting for exhaust leaks, and scanning for any other related trouble codes.

5. Can I still drive my 2006 Nissan Altima Sedan with a P0139 code?

- It is generally safe to drive the vehicle for a short distance with a P0139 code, but prolonged driving with a faulty oxygen sensor can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair a P0139 code on my 2006 Nissan Altima Sedan?

- Repair options include replacing the HO2S12 sensor, repairing any damaged wiring, fixing exhaust leaks, addressing engine misfires, and ensuring the catalytic converter is functioning properly.

7. Will resetting the check engine light resolve the P0139 code on a 2006 Nissan Altima Sedan?

- Simply resetting the check engine light may temporarily clear the code, but the underlying issue causing the P0139 code will need to be properly diagnosed and repaired to prevent it from reoccurring.

8. How much does it typically cost to repair a P0139 code on a 2006 Nissan Altima Sedan?

- The cost of repairing a P0139 code can vary depending on the specific issue, but it may range from $100 to $400 for parts and labor, with sensor replacement being a common repair.

9. Can a DIY enthusiast fix a P0139 code on a 2006 Nissan Altima Sedan?

- While some aspects of diagnosing and repairing a P0139 code can be tackled by DIY enthusiasts, it is recommended to have a professional mechanic perform the repair to ensure proper diagnosis and a successful fix.

10. How often does a P0139 code occur in a 2006 Nissan Altima Sedan?

- The occurrence of a P0139 code can vary depending on the vehicle's condition and maintenance history, but it is a relatively common issue that may arise as the vehicle ages.

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