AutoCodes – Nissan – P0137 2012 Nissan Pathfinder

P0137 2012 Nissan Pathfinder Code - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

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: P0137 2012 Nissan Pathfinder indicates Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
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 4,001

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0137 2012 Nissan Pathfinder 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 P0137 2012 Nissan Pathfinder - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com — P0137 2012 Nissan Pathfinder Code - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0137 2012 Nissan Pathfinder?

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 P0137 2012 Nissan Pathfinder?

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 P0137 2012 Nissan Pathfinder 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.

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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 P0137 2012 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0137 in a 2012 Nissan Pathfinder?

- Common symptoms include a decrease in fuel efficiency, rough idling, engine performance issues, and the illumination of the check engine light.

2. What does the OBDII code P0137 "Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2" mean in a 2012 Nissan Pathfinder?

- This code indicates that the oxygen sensor downstream of the catalytic converter in Bank 1 is not operating within the expected voltage range.

3. What are some possible causes of the P0137 code in a 2012 Nissan Pathfinder?

- Common causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, damaged catalytic converter, or a malfunctioning engine control module (ECM).

4. How can I diagnose the P0137 code in my 2012 Nissan Pathfinder?

- Diagnosing this code involves checking the wiring and connections of the oxygen sensor, inspecting for exhaust leaks, testing the sensor's voltage output, and scanning the ECM for any related trouble codes.

5. Can I continue driving my 2012 Nissan Pathfinder with the P0137 code?

- It is not recommended to drive the vehicle for an extended period with this code as it can lead to poor fuel economy, decreased engine performance, and potential damage to the catalytic converter.

6. How can I repair the P0137 code in my 2012 Nissan Pathfinder?

- Repair options include replacing the Bank 1 Sensor 2 oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, and resetting the ECM after completing the repairs.

7. Is it possible to reset the check engine light after fixing the P0137 code in a 2012 Nissan Pathfinder?

- Yes, you can reset the check engine light using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the stored trouble codes.

8. How much does it typically cost to repair the P0137 code in a 2012 Nissan Pathfinder?

- The cost of repairs can vary depending on the specific issue, but replacing an oxygen sensor can range from $100 to $300, while fixing wiring or exhaust leaks may cost more.

9. Are there any preventive maintenance tips to avoid the recurrence of the P0137 code in a 2012 Nissan Pathfinder?

- Regularly inspecting the oxygen sensors, addressing any engine performance issues promptly, and maintaining the vehicle according to the manufacturer's recommendations can help prevent this code from reoccurring.

10. Can a DIY enthusiast fix the P0137 code in a 2012 Nissan Pathfinder, or should it be done by a professional mechanic?

- Depending on your skill level and access to tools, you may be able to replace the oxygen sensor or address minor wiring issues yourself. However, for more complex problems or if you are unsure, it's best to consult a professional mechanic.