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

Quick Answer

The P0137 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates a problem with the Heated Oxygen Sensor (HO2S) Circuit Low Voltage for Bank 1 Sensor 2. Common causes include Faulty HO2S, Wiring issues (shorts, opens, or frayed wires), Exhaust leaks. 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 Sentra indicates Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty HO2S, Wiring issues (shorts, opens, or frayed wires), Exhaust leaks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0137 2012 Nissan Sentra Description

The P0137 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates a problem with the Heated Oxygen Sensor (HO2S) Circuit Low Voltage for Bank 1 Sensor 2. This sensor is located downstream of the catalytic converter and is responsible for monitoring the oxygen levels in the exhaust gases. The HO2S provides feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion efficiency.

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

Common Causes of P0137 2012 Nissan Sentra

  1. Faulty HO2S
  2. Wiring issues (shorts, opens, or frayed wires)
  3. Exhaust leaks
  4. ECM software issues
  5. Poor electrical connections

Symptoms of P0137 2012 Nissan Sentra

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Failed emissions test

How to Fix P0137 2012 Nissan Sentra

  1. Begin by diagnosing the issue with a scan tool to confirm the P0137 code and identify the specific sensor causing the problem.
  2. Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as necessary.
  3. Test the HO2S using a multimeter to check for proper voltage output. Replace the sensor if it is faulty.
  4. Clear the DTC and perform a test drive to ensure the code does not return.
  5. If the code persists, further diagnostics may be needed to identify any underlying issues with the ECM or exhaust system.

Cost to Fix P0137 2012 Nissan Sentra

The cost of repairing a P0137 code on a 2012 Nissan Sentra can vary depending on the specific cause of the issue. Typically, the cost of a new HO2S sensor ranges from $50 to $200, while labor costs can range from $100 to $200. Overall, the total repair cost could range from $150 to $400. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0137 2012 Nissan Sentra

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

When is the Code Detected?

The P0137 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively low for an extended period of time.

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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 Sentra Code

1. What are the common symptoms of OBDII code P0137 on a 2012 Nissan Sentra?

- Common symptoms include decreased fuel efficiency, rough idle, engine misfires, 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 for a 2012 Nissan Sentra?

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

3. What are some possible causes of the P0137 code on a 2012 Nissan Sentra?

- Common causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, a faulty catalytic converter, or issues with the engine's fuel system.

4. How can I diagnose the cause of the P0137 code on my 2012 Nissan Sentra?

- Diagnosing the issue involves checking the oxygen sensor's wiring and connections, inspecting the sensor itself, looking for exhaust leaks, and testing the catalytic converter's efficiency.

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

- It is generally not recommended to continue driving with this code illuminated, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.

6. How can I repair the P0137 code on my 2012 Nissan Sentra?

- Repair options may include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, addressing fuel system issues, or replacing the catalytic converter if necessary.

7. Is it possible to reset the OBDII code P0137 on a 2012 Nissan Sentra without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, the issue causing the code will persist and may trigger the code again if not properly addressed.

8. Can a DIY enthusiast fix the P0137 code on a 2012 Nissan Sentra?

- Depending on the root cause, DIY enthusiasts with adequate knowledge and tools may be able to address issues like replacing the oxygen sensor or repairing wiring. However, more complex problems may require professional assistance.

9. How much does it typically cost to repair the P0137 code on a 2012 Nissan Sentra?

- The cost of repair can vary widely depending on the exact cause of the issue, but replacing an oxygen sensor can range from $100 to $300, while addressing catalytic converter problems can be more expensive.

10. How often should the oxygen sensors be replaced on a 2012 Nissan Sentra to prevent the P0137 code from recurring?

- Oxygen sensors typically have a lifespan of around 60,000 to 100,000 miles, so it's recommended to replace them within this interval to prevent issues like the P0137 code from reoccurring.

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