AutoCodes – Nissan – P0138 2009 Nissan Rogue

P0138 2009 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 2009 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 2,883
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 14, 2024
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Code P0138 2009 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 2009 Nissan Rogue - HO2S12 Circuit High Voltage - AutoCodes.com
P0138 2009 Nissan Rogue Code - HO2S12 Circuit High Voltage

What are the Possible Causes of the DTC P0138 2009 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 2009 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0138 2009 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 2009 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 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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