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P0137 Volkswagen Code - O2 Sensor Circuit Low Voltage

Quick Answer

The P0137 diagnostic trouble code (DTC) for Volkswagen vehicles specifically indicates an issue with the O2 sensor circuit having low voltage. Common causes include Faulty O2 sensor, Wiring issues or corrosion in the O2 sensor circuit, Exhaust leaks near the O2 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 Volkswagen indicates O2 Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty O2 sensor, Wiring issues or corrosion in the O2 sensor circuit, Exhaust leaks near the O2 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 07, 2024
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Code P0137 Volkswagen Description

The P0137 diagnostic trouble code (DTC) for Volkswagen vehicles specifically indicates an issue with the O2 sensor circuit having low voltage. The O2 sensor, also known as the oxygen sensor, plays a critical role in monitoring the oxygen levels in the exhaust gases and sending this data to the engine control module (ECM). This information is crucial for the ECM to adjust the air-fuel mixture to optimize combustion and reduce emissions.

OBDII Code P0137 Volkswagen - O2 Sensor Circuit Low Voltage
P0137 Volkswagen Code - O2 Sensor Circuit Low Voltage

Common Causes of P0137 Volkswagen

  1. Faulty O2 sensor
  2. Wiring issues or corrosion in the O2 sensor circuit
  3. Exhaust leaks near the O2 sensor
  4. Vacuum leaks in the intake system
  5. Issues with the ECM or engine computer

Symptoms of P0137 Volkswagen

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Poor engine performance, including rough idling or hesitation
  4. Increased emissions
  5. Failed emissions test

How to Fix P0137 Volkswagen

  1. Use a diagnostic scanner to confirm the P0137 code and pinpoint the exact cause of the issue.
  2. Inspect the O2 sensor and its wiring for any damage or corrosion. Replace the O2 sensor if necessary.
  3. Check for any exhaust leaks near the O2 sensor and repair them.
  4. Inspect the intake system for vacuum leaks and address any leaks found.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0137 Volkswagen

The cost of repairing a P0137 code for a Volkswagen vehicle can vary depending on the specific model and year of the vehicle, as well as the extent of the issue. On average, the cost of replacing an O2 sensor can range from $200 to $400, including parts and labor. Additional costs may apply if there are other underlying issues contributing to the low voltage in the O2 sensor circuit. It's recommended to consult with a professional mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location. Remember that labor rates and diagnostic fees can vary, so it's advisable to shop around for the best deal.

What does this mean?

Tech Notes for P0137 Volkswagen

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 Volkswagen Code

1. What are the common symptoms of OBDII code P0137 in a Volkswagen related to the O2 sensor circuit low voltage issue?

The common symptoms include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.

2. What are the possible causes of OBDII code P0137 in a Volkswagen indicating a low voltage condition in the O2 sensor circuit?

Potential causes may include a faulty O2 sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine's computer system.

3. How can I diagnose the O2 sensor circuit low voltage issue causing OBDII code P0137 in my Volkswagen?

You can diagnose the problem by conducting a visual inspection of the sensor and its connections, testing the sensor's voltage output, checking for exhaust leaks, and using an OBDII scanner to monitor sensor data.

4. What are the recommended steps to repair OBDII code P0137 in a Volkswagen due to a low voltage issue in the O2 sensor circuit?

Repair steps may involve replacing the faulty O2 sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, or resetting the engine's computer after making necessary repairs.

5. Can driving with OBDII code P0137 related to the O2 sensor circuit low voltage problem damage my Volkswagen's engine?

Continued driving with this issue may lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time.

6. Is it possible to reset the check engine light after repairing OBDII code P0137 caused by a low voltage condition in the O2 sensor circuit of a Volkswagen?

Yes, after repairing the issue, you can reset the check engine light using an OBDII scanner or disconnecting the car's battery for a few minutes.

7. Will OBDII code P0137 in a Volkswagen resolve on its own, or does it require immediate attention?

The issue causing code P0137 is unlikely to resolve on its own and should be addressed promptly to prevent further engine performance issues and potential damage.

8. How can I prevent O2 sensor circuit low voltage issues leading to OBDII code P0137 in my Volkswagen in the future?

Regular maintenance, such as checking the sensor's condition during tune-ups, ensuring proper wiring connections, and addressing exhaust leaks promptly, can help prevent this issue.

9. Are there any DIY repair options for fixing OBDII code P0137 related to the O2 sensor circuit low voltage problem in a Volkswagen?

While some basic checks like inspecting wiring and connectors can be done DIY, replacing the O2 sensor or addressing more complex issues may require professional assistance.

10. Can a Volkswagen still pass an emissions test with OBDII code P0137 triggered by the O2 sensor circuit low voltage issue?

In most cases, a vehicle with an active OBDII code like P0137 will fail an emissions test. It is recommended to repair the issue before attempting to pass an emissions inspection.

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