AutoCodes – Nissan – P0138 2010 Nissan Rogue

P0138 2010 Nissan Rogue Code - HO2S12 Circuit High Voltage

Quick Answer

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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: P0138 2010 Nissan Rogue indicates HO2S12 Circuit High Voltage.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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.

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Code Popularity 4,077

How popular is this code, among other codes? Low

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 Apr 14, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0138 2010 Nissan Rogue Description

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P0138 2010 Nissan Rogue - HO2S12 Circuit High Voltage - AutoCodes.com — P0138 2010 Nissan Rogue Code - HO2S12 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0138 2010 Nissan Rogue?

Faulty Rear Heated Oxygen Sensor Bank 1
Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
Intake air leaks
Exhaust gas leaks
Inappropriate fuel pressure
Faulty fuel injectors

How to Fix the DTC P0138 2010 Nissan Rogue?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0138 2010 Nissan Rogue 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 P0138 2010 Nissan Rogue code?

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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 2010 Nissan Rogue Code

1. What does OBDII code P0138 for a 2010 Nissan Rogue mean?

This code, HO2S12 Circuit High Voltage, indicates a problem with the oxygen sensor (O2 sensor) located in the downstream position on bank 1 of your vehicle.

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

Common symptoms include decreased fuel efficiency, rough idling, poor engine performance, and the illumination of the check engine light on the dashboard.

3. What are the possible causes of OBDII code P0138 in a 2010 Nissan Rogue?

The most common causes include a faulty oxygen sensor, wiring issues in the HO2S12 circuit, exhaust leaks near the sensor, or an engine running too rich.

4. How can I diagnose the OBDII code P0138 issue in my Nissan Rogue?

Diagnosis typically involves inspecting the oxygen sensor and its wiring for damage, checking for exhaust leaks, and using a scan tool to monitor sensor data and voltage readings.

5. Can I continue driving my Nissan Rogue with OBDII code P0138?

It's not recommended to drive your vehicle for an extended period with this code as it can lead to further damage and poor fuel economy. Get it diagnosed and repaired as soon as possible.

6. How can I repair OBDII code P0138 in my 2010 Nissan Rogue?

Repair options may include replacing the faulty oxygen sensor, repairing or replacing damaged wiring, fixing any exhaust leaks, and resetting the code with a scan tool.

7. Is it possible to reset OBDII code P0138 in a Nissan Rogue without fixing the issue?

While you can clear the code using a scan tool, the underlying problem must be addressed. Resetting the code without fixing the issue can lead to recurring check engine light illumination.

8. Can a DIY enthusiast fix OBDII code P0138 in a Nissan Rogue?

Depending on your mechanical skills and access to tools, you may be able to replace the oxygen sensor or address wiring issues yourself. However, consulting a professional is recommended for accurate diagnosis and repair.

9. How much does it cost to repair OBDII code P0138 in a 2010 Nissan Rogue?

The cost can vary based on the underlying issue, parts needed, and labor rates. On average, repairing this code may cost between $150 to $400 at a dealership or repair shop.

10. How often does OBDII code P0138 occur in a 2010 Nissan Rogue?

While not extremely common, this code can occur due to various factors such as sensor wear, wiring degradation, or exhaust system issues. Regular maintenance can help prevent such issues.