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Engine-Codes – Nissan – P0137 2008 Nissan Sentra

P0137 2008 Nissan Sentra Code - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

The P0137 diagnostic trouble code (DTC) for a 2008 Nissan Sentra indicates a problem with the Heated Oxygen Sensor (HO2S) Circuit Low Voltage for Bank 1 Sensor 2. Common causes include Faulty Heated Oxygen Sensor (HO2S), Damaged or corroded wiring/connectors, Exhaust leaks near the sensor. 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 2008 Nissan Sentra indicates Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty Heated Oxygen Sensor (HO2S), Damaged or corroded wiring/connectors, Exhaust leaks near the sensor.
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 17, 2024
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Code P0137 2008 Nissan Sentra Description

The P0137 diagnostic trouble code (DTC) for a 2008 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 in the exhaust system and is responsible for monitoring the oxygen levels in the exhaust gases. The sensor sends data to the engine control module (ECM) to help adjust the air-fuel mixture for optimal combustion.

OBDII Code P0137 2008 Nissan Sentra - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2
P0137 2008 Nissan Sentra Code - Heated Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

Common Causes of P0137 2008 Nissan Sentra

  1. Faulty Heated Oxygen Sensor (HO2S)
  2. Damaged or corroded wiring/connectors
  3. Exhaust leaks near the sensor
  4. Engine running too rich or too lean
  5. Issues with the ECM

Symptoms of P0137 2008 Nissan Sentra

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine hesitation or misfiring
  4. Illuminated check engine light
  5. Failed emissions test

How to Fix P0137 2008 Nissan Sentra

  1. Use an OBD-II scanner to confirm the P0137 code and identify the specific sensor causing the issue.
  2. Inspect the wiring 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 code from the ECM's memory and perform a test drive to ensure the issue has been resolved.
  5. If the code persists, further diagnostics may be needed to identify underlying issues with the engine's air-fuel mixture or exhaust system.

Cost to Fix P0137 2008 Nissan Sentra

The cost of repairing a P0137 code on a 2008 Nissan Sentra can vary depending on the specific cause of the issue. In general, the price range for parts such as a new HO2S sensor can be between $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost could fall between $150 to $500. It's important to note that these estimates are rough averages, and actual costs may vary based on the location, shop rates, and any additional repairs or parts needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

What does this mean?

Tech Notes for P0137 2008 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 2008 Nissan Sentra Code

1. What does the OBDII code P0137 for a 2008 Nissan Sentra mean?

- The code P0137 indicates a low voltage condition in the heated oxygen sensor circuit for Bank 1 Sensor 2 in a 2008 Nissan Sentra.

2. What are the common symptoms of a P0137 code in a 2008 Nissan Sentra?

- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and the illumination of the Check Engine Light.

3. What are the possible causes of a P0137 code in a 2008 Nissan Sentra?

- Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's computer.

4. How can I diagnose a P0137 code in my 2008 Nissan Sentra?

- Diagnosing a P0137 code typically involves checking the oxygen sensor's voltage readings, inspecting the sensor's wiring and connectors, and verifying the exhaust system for leaks.

5. Can I drive my 2008 Nissan Sentra with a P0137 code?

- It is not recommended to drive your vehicle with a P0137 code as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair a P0137 code in my 2008 Nissan Sentra?

- Repairing a P0137 code may involve replacing the oxygen sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, or resetting the engine's computer.

7. Is it necessary to replace the oxygen sensor for a P0137 code in a 2008 Nissan Sentra?

- In many cases, replacing the oxygen sensor is the most common solution for resolving a P0137 code, especially if the sensor is faulty or degraded.

8. Can a P0137 code be triggered by a loose gas cap in a 2008 Nissan Sentra?

- No, a loose gas cap is not typically related to a P0137 code. This code is specific to the oxygen sensor circuit's voltage readings.

9. How much does it cost to repair a P0137 code in a 2008 Nissan Sentra?

- The cost of repairing a P0137 code can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Will a P0137 code cause my 2008 Nissan Sentra to fail an emissions test?

- Yes, a P0137 code can cause your 2008 Nissan Sentra to fail an emissions test due to the impact it has on the vehicle's emissions control system.

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