Engine-CodesToyota – P0137 2008 Toyota Prius

P0137 2008 Toyota Prius Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

The P0137 diagnostic trouble code (DTC) for a 2008 Toyota Prius specifically indicates an issue with the Oxygen Sensor Circuit Low Voltage for Bank 1 Sensor 2. Common causes include Faulty oxygen sensor, Damaged wiring or connectors in the sensor circuit, 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 Toyota Prius indicates Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty oxygen sensor, Damaged wiring or connectors in the sensor circuit, 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.
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0137 2008 Toyota Prius Description

The P0137 diagnostic trouble code (DTC) for a 2008 Toyota Prius specifically indicates an issue with the Oxygen Sensor 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 data collected by this sensor is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion efficiency.

OBDII Code P0137 2008 Toyota Prius - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2
P0137 2008 Toyota Prius Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

Common Causes of P0137 2008 Toyota Prius

  1. Faulty oxygen sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Exhaust leaks near the sensor
  4. Issues with the ECM
  5. Contaminated fuel affecting sensor readings

Symptoms of P0137 2008 Toyota Prius

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation during acceleration
  4. Increased emissions
  5. Check Engine Light illuminated on the dashboard

How to Fix P0137 2008 Toyota Prius

  1. Use an OBD-II scanner to confirm the P0137 code and pinpoint the exact sensor location.
  2. Inspect the wiring and connectors for any damage or corrosion. Repair or replace as needed.
  3. Check for exhaust leaks near the sensor and repair them if found.
  4. Replace the oxygen sensor if it is determined to be faulty.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0137 2008 Toyota Prius

The cost estimate for repairing a P0137 code on a 2008 Toyota Prius can vary depending on the specific cause of the issue. On average, replacing an oxygen sensor can cost between $200 and $300 for parts and labor. However, if additional repairs or diagnostics are needed, the total cost could be higher. It's important to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of your vehicle. Labor rates typically range from $80 to $150 per hour, but can vary based on location and shop rates.

Tech Notes for P0137 2008 Toyota Prius

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 Toyota Prius Code

1. What does OBDII code P0137 on a 2008 Toyota Prius mean?

This code indicates a low voltage condition in the oxygen sensor circuit for Bank 1 Sensor 2.

2. What are the common symptoms of a P0137 code in a 2008 Toyota Prius?

Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light.

3. What are the possible causes of a P0137 code in a 2008 Toyota Prius?

Potential causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's air-fuel mixture.

4. How can I diagnose a P0137 code in my 2008 Toyota Prius?

Diagnosis typically involves using a scan tool to read the code, testing the oxygen sensor's voltage output, inspecting the sensor and its wiring for damage, and checking for exhaust leaks.

5. Can I continue driving my 2008 Toyota Prius with a P0137 code?

While the vehicle may still be driveable with this code, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

6. How do I repair a P0137 code on a 2008 Toyota Prius?

Repair options may include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing exhaust leaks, or addressing any issues with the air-fuel mixture.

7. Can I reset the check engine light after fixing a P0137 code on a 2008 Toyota Prius?

Yes, the check engine light can be reset using an OBDII scan tool after the repair has been completed. This will clear the code and turn off the light.

8. How much does it cost to fix a P0137 code on a 2008 Toyota Prius?

The cost of repairs for a P0137 code can vary depending on the specific issue causing the code. Costs may include parts and labor for sensor replacement, wiring repairs, or other necessary fixes.

9. What is the role of Bank 1 Sensor 2 in the exhaust system of a 2008 Toyota Prius?

Bank 1 Sensor 2 is located downstream of the catalytic converter and monitors the oxygen levels in the exhaust gases to help ensure proper emissions control and engine performance.

10. How often should the oxygen sensors be replaced in a 2008 Toyota Prius?

Oxygen sensors typically have a lifespan of around 100,000 miles, but it's recommended to follow the manufacturer's maintenance schedule and replace them as needed to maintain optimal vehicle performance.

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