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

Quick Answer

The P0137 code for Nissan vehicles indicates an issue with the Heated Oxygen Sensor (HO2S) circuit for Bank 1 Sensor 2, specifically a low voltage reading. Common causes include Faulty Heated Oxygen Sensor (HO2S): The sensor itself may be malfunctioning and not providing the correct voltage readings, Damaged Wiring or Connectors: Issues with the wiring or connectors in the sensor circuit can lead to a low voltage reading, Exhaust System Leaks: Leaks in the exhaust system can affect the readings of the HO2S. 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 Nissan indicates Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty Heated Oxygen Sensor (HO2S): The sensor itself may be malfunctioning and not providing the correct voltage readings, Damaged Wiring or Connectors: Issues with the wiring or connectors in the sensor circuit can lead to a low voltage reading, Exhaust System Leaks: Leaks in the exhaust system can affect the readings of the HO2S.
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 11, 2024
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Code P0137 Nissan Description

The P0137 code for Nissan vehicles indicates an issue with the Heated Oxygen Sensor (HO2S) circuit for Bank 1 Sensor 2, specifically a low voltage reading. The HO2S is responsible for monitoring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

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

Common Causes of P0137 Nissan

  1. Faulty Heated Oxygen Sensor (HO2S): The sensor itself may be malfunctioning and not providing the correct voltage readings.
  2. Damaged Wiring or Connectors: Issues with the wiring or connectors in the sensor circuit can lead to a low voltage reading.
  3. Exhaust System Leaks: Leaks in the exhaust system can affect the readings of the HO2S.
  4. Engine Vacuum Leaks: Vacuum leaks in the engine can also impact the performance of the HO2S.
  5. ECM Malfunction: A malfunctioning ECM can prevent the correct interpretation of the sensor's signals.

Symptoms of P0137 Nissan

  1. Check Engine Light: The most common symptom associated with the P0137 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Poor Fuel Economy: A malfunctioning HO2S can lead to an incorrect air-fuel mixture, resulting in decreased fuel efficiency.
  3. Rough Idling: The engine may idle roughly or inconsistently due to the incorrect air-fuel ratio.
  4. Decreased Engine Performance: The vehicle may experience a loss of power or acceleration due to the faulty HO2S.
  5. Increased Emissions: A malfunctioning HO2S can lead to higher emissions output from the vehicle.

How to Fix P0137 Nissan

  1. Diagnose the Issue: Use a diagnostic scanner to read the trouble codes and pinpoint the exact cause of the problem.
  2. Inspect Wiring and Connectors: Check the wiring and connectors in the sensor circuit for any damage or corrosion and repair or replace as needed.
  3. Replace HO2S: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor.
  4. Clear Codes: After making the necessary repairs, clear the trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.
  5. Retest: After driving the vehicle for a while, recheck for any new trouble codes to ensure the repair was successful.

Cost to Fix P0137 Nissan

The typical repair costs for addressing a P0137 code on a Nissan vehicle can vary depending on the specific cause of the issue. In general, the cost of replacing a Heated Oxygen Sensor can range from $100 to $200 for the part alone. Labor costs can add an additional $100 to $200, with total repair costs typically falling between $200 and $400.

What does this mean?

Tech Notes for P0137 Nissan

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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Information for Specific Nissan Models

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 Nissan Code

1. What are the common symptoms of OBDII code P0137 in a Nissan related to the Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2?

- Common symptoms include poor fuel efficiency, rough idling, stalling, and an illuminated check engine light.

2. What are some possible causes of OBDII code P0137 in a Nissan?

- Potential causes include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning engine computer.

3. How can I diagnose the cause of OBDII code P0137 in my Nissan?

- Use a scan tool to read the code, inspect the wiring and connections to the oxygen sensor, perform a voltage test, and check for exhaust leaks.

4. Can a dirty or clogged air filter trigger OBDII code P0137 in a Nissan?

- While a dirty air filter may affect engine performance, it is unlikely to directly cause the Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 fault code.

5. What repair steps can I take to address OBDII code P0137 in my Nissan?

- Repair options may include replacing the oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or resetting the engine computer.

6. Is it safe to continue driving my Nissan with OBDII code P0137 present?

- It is generally safe to drive the vehicle for a short period with this code, but prolonged driving with a faulty oxygen sensor can lead to reduced fuel efficiency and potential engine damage.

7. Can I reset the check engine light after addressing OBDII code P0137 in my Nissan?

- Yes, you can reset the check engine light using an OBDII scanner once the underlying issue causing the code has been resolved.

8. How can I prevent OBDII code P0137 from recurring in my Nissan?

- To prevent the code from reoccurring, ensure regular maintenance of your vehicle, fix any exhaust leaks promptly, and use quality oxygen sensors during replacements.

9. Will OBDII code P0137 cause my Nissan to fail an emissions test?

- Yes, having this fault code present in your Nissan may cause it to fail an emissions test, as it indicates a problem with the vehicle's emissions control system.

10. Is it possible to drive my Nissan without repairing OBDII code P0137?

- While possible, it is not recommended to ignore this fault code, as it can lead to decreased fuel efficiency, poor engine performance, and potential long-term damage to the vehicle.

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