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Engine-Codes – Nissan – P0138 2009 Nissan Rogue

P0138 2009 Nissan Rogue Code - HO2S12 Circuit High Voltage

Quick Answer

The P0138 code on a 2009 Nissan Rogue indicates an issue with the HO2S12 sensor, also known as the heated oxygen sensor located in bank 1 sensor 2. Common causes include Faulty HO2S12 sensor, Wiring issues or shorts in the sensor circuit, 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
P0138 2009 Nissan Rogue indicates HO2S12 Circuit High Voltage.
Common causes
Common causes include Faulty HO2S12 sensor, Wiring issues or shorts in the sensor circuit, 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 10, 2024
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Code P0138 2009 Nissan Rogue Description

The P0138 code on a 2009 Nissan Rogue indicates an issue with the HO2S12 sensor, also known as the heated oxygen sensor located in bank 1 sensor 2. This sensor is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the sensor detects a high voltage signal, it means that the oxygen level in the exhaust is lower than expected, which can lead to an overly rich air-fuel mixture.

OBDII Code P0138 2009 Nissan Rogue - HO2S12 Circuit High Voltage
P0138 2009 Nissan Rogue Code - HO2S12 Circuit High Voltage

Common Causes of P0138 2009 Nissan Rogue

  1. Faulty HO2S12 sensor
  2. Wiring issues or shorts in the sensor circuit
  3. Exhaust leaks near the sensor
  4. Engine misfires
  5. Exhaust system issues

Symptoms of P0138 2009 Nissan Rogue

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

How to Fix P0138 2009 Nissan Rogue

  1. Diagnose the issue using a scan tool to confirm the P0138 code and inspect the HO2S12 sensor and wiring for any visible damage.
  2. Replace the HO2S12 sensor if it is determined to be faulty. Ensure the new sensor is compatible with the vehicle's make and model.
  3. Repair any damaged wiring or connections in the sensor circuit.
  4. Check for and repair any exhaust leaks near the sensor.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0138 2009 Nissan Rogue

The cost of repairing a P0138 code on a 2009 Nissan Rogue can vary depending on the specific cause of the issue. Generally, the cost of a new HO2S12 sensor can range from $50 to $200, depending on the brand and quality. Labor costs for sensor replacement and diagnostics can range from $100 to $300, depending on the shop's hourly rates and the complexity of the repair. Overall, the total repair cost for addressing a P0138 code typically falls between $150 and $500. It is advisable to check with local auto repair shops for accurate pricing based on your location and vehicle.

What does this mean?

Tech Notes for P0138 2009 Nissan Rogue

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

When is the Code Detected?

The P0138 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively high for an extended period of 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 P0138 2009 Nissan Rogue Code

1. What does OBDII code P0138 on a 2009 Nissan Rogue mean?

The code P0138 for a 2009 Nissan Rogue indicates a high voltage condition in the HO2S12 (Heated Oxygen Sensor 1, Bank 1 Sensor 2) circuit.

2. What are the common symptoms of OBDII code P0138 on a 2009 Nissan Rogue?

Common symptoms of code P0138 in a 2009 Nissan Rogue may include poor fuel economy, engine hesitation, rough idling, and an illuminated check engine light.

3. What are the possible causes of OBDII code P0138 on a 2009 Nissan Rogue?

The high voltage condition indicated by code P0138 on a 2009 Nissan Rogue may be caused by a faulty HO2S12 sensor, wiring issues in the sensor circuit, or an engine running too rich.

4. How can I diagnose the cause of OBDII code P0138 on a 2009 Nissan Rogue?

To diagnose the cause of code P0138 on a 2009 Nissan Rogue, you can start by checking the wiring and connector of the HO2S12 sensor, testing the sensor itself, and inspecting for any exhaust leaks that could affect sensor readings.

5. Can I drive my 2009 Nissan Rogue with OBDII code P0138?

It is not recommended to drive your 2009 Nissan Rogue with code P0138 unresolved, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How do I repair OBDII code P0138 on a 2009 Nissan Rogue?

To repair code P0138 on a 2009 Nissan Rogue, you may need to replace the HO2S12 sensor, repair any damaged wiring, clear the code with a diagnostic scanner, and monitor the sensor's performance.

7. Are there any DIY tips for fixing OBDII code P0138 on a 2009 Nissan Rogue?

DIY tips for addressing code P0138 on a 2009 Nissan Rogue include checking the sensor's connections, inspecting for visible damage to the sensor or wiring, and ensuring the sensor is receiving the correct voltage.

8. How much does it cost to repair OBDII code P0138 on a 2009 Nissan Rogue?

The cost to repair OBDII code P0138 on a 2009 Nissan Rogue can vary depending on the specific issue, but it may involve sensor replacement, which can range from $100 to $200, plus labor costs if done at a shop.

9. Can a faulty HO2S12 sensor cause other issues besides triggering code P0138 on a 2009 Nissan Rogue?

Yes, a faulty HO2S12 sensor on a 2009 Nissan Rogue can cause other issues such as poor engine performance, increased emissions, and potential damage to the catalytic converter if left unresolved.

10. How often should the HO2S12 sensor be replaced in a 2009 Nissan Rogue?

The HO2S12 sensor in a 2009 Nissan Rogue typically has a lifespan of around 60,000 to 100,000 miles, but it is recommended to follow the vehicle manufacturer's maintenance schedule for specific replacement intervals.

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