AutoCodes – Nissan – P0138 2011 Nissan Rogue

P0138 2011 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 2011 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 2,633

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 2011 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 2011 Nissan Rogue - HO2S12 Circuit High Voltage - AutoCodes.com — P0138 2011 Nissan Rogue Code - HO2S12 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0138 2011 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 2011 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 2011 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 2011 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 2011 Nissan Rogue Code

1. What does OBDII code P0138 for a 2011 Nissan Rogue indicate?

- OBDII code P0138 in a 2011 Nissan Rogue indicates a high voltage condition in the HO2S12 (Heated Oxygen Sensor Bank 1 Sensor 2) circuit.

2. What are the common symptoms of OBDII code P0138 in a 2011 Nissan Rogue?

- Common symptoms of P0138 in a 2011 Nissan Rogue include poor fuel economy, rough idling, and potential stalling.

3. What are the potential causes of OBDII code P0138 in a 2011 Nissan Rogue?

- The potential causes of P0138 in a 2011 Nissan Rogue include a faulty HO2S12 sensor, wiring issues, exhaust leaks, or a problem with the engine's fuel system.

4. How can I diagnose the cause of OBDII code P0138 in my 2011 Nissan Rogue?

- To diagnose P0138 in a 2011 Nissan Rogue, you can use a scan tool to monitor the live data from the HO2S12 sensor and check for any wiring or exhaust system issues.

5. Can a dirty or contaminated HO2S12 sensor trigger OBDII code P0138 in a 2011 Nissan Rogue?

- Yes, a dirty or contaminated HO2S12 sensor can lead to incorrect readings and trigger P0138 in a 2011 Nissan Rogue.

6. How can I fix OBDII code P0138 in my 2011 Nissan Rogue?

- To fix P0138 in a 2011 Nissan Rogue, you may need to replace the HO2S12 sensor, repair any wiring issues, fix exhaust leaks, or address any fuel system problems.

7. Is it safe to continue driving my 2011 Nissan Rogue with OBDII code P0138?

- It is not recommended to continue driving your 2011 Nissan Rogue with P0138 as it can lead to poor engine performance and potential damage if left unresolved.

8. Can a DIY enthusiast repair OBDII code P0138 in a 2011 Nissan Rogue?

- A DIY enthusiast with the necessary tools and knowledge can attempt to repair P0138 in a 2011 Nissan Rogue, but it is recommended to seek professional help for accurate diagnosis and proper repairs.

9. Will resetting the OBDII system clear the P0138 code in my 2011 Nissan Rogue?

- Resetting the OBDII system may temporarily clear the P0138 code in your 2011 Nissan Rogue, but if the underlying issue is not addressed, the code is likely to reappear.

10. How much does it typically cost to repair OBDII code P0138 in a 2011 Nissan Rogue?

- The cost to repair P0138 in a 2011 Nissan Rogue can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.