AutoCodes – Nissan – P0139 2008 Nissan Rogue

P0139 2008 Nissan Rogue Code - HO2S12 Slow Response

Quick Answer

The Heated Oxygen Sensor 2 (HO2S), 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: P0139 2008 Nissan Rogue indicates HO2S12 Slow Response.
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 2,846

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 P0139 2008 Nissan Rogue Description

The Heated Oxygen Sensor 2 (HO2S), 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 P0139 2008 Nissan Rogue - HO2S12 Slow Response - AutoCodes.com — P0139 2008 Nissan Rogue Code - HO2S12 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0139 2008 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
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0139 2008 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 P0139 2008 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 P0139 2008 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 P0139 2008 Nissan Rogue Code

1. What does the OBDII code P0139 on a 2008 Nissan Rogue mean?

This code indicates a slow response from the downstream oxygen sensor (HO2S12) in the bank 1 sensor 2.

2. What are the common symptoms of a P0139 code in a 2008 Nissan Rogue?

Common symptoms include poor fuel economy, rough idling, engine misfires, and potential issues with emission levels.

3. What are the possible causes of a P0139 code in a 2008 Nissan Rogue?

Potential causes include a faulty oxygen sensor, wiring or connector issues, exhaust leaks, engine misfires, or a problem with the fuel system.

4. How can I diagnose a P0139 code in my 2008 Nissan Rogue?

You can diagnose this code by checking the oxygen sensor's wiring and connectors, inspecting for exhaust leaks, testing the sensor's voltage output, and conducting a scan tool evaluation.

5. Can a P0139 code in a 2008 Nissan Rogue be fixed easily?

Fixing a P0139 code may vary in difficulty depending on the underlying issue. Simple fixes like replacing the oxygen sensor or repairing wiring may resolve the problem.

6. What are some repair tips for a P0139 code in a 2008 Nissan Rogue?

Repair tips include ensuring proper installation of the oxygen sensor, addressing any exhaust leaks, clearing debris from the sensor area, and using a diagnostic tool to reset the code after repairs.

7. Is it safe to continue driving with a P0139 code in a 2008 Nissan Rogue?

It is generally not recommended to drive with a P0139 code unresolved, as it can lead to decreased fuel efficiency and potential damage to the vehicle's catalytic converter.

8. How much does it cost to repair a P0139 code in a 2008 Nissan Rogue?

The cost of repairing a P0139 code can vary depending on the specific issue and whether you choose to perform the repairs yourself or take the vehicle to a mechanic. Costs may include parts and labor.

9. Can a P0139 code in a 2008 Nissan Rogue cause other problems if left untreated?

If left untreated, a P0139 code can potentially lead to further damage to the vehicle's engine, reduced performance, and increased emissions, which may cause the vehicle to fail emissions tests.

10. How often does a P0139 code occur in a 2008 Nissan Rogue?

The occurrence of a P0139 code can vary depending on the vehicle's maintenance history, driving conditions, and other factors. Regular vehicle maintenance can help prevent the occurrence of this code.