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P0137 Jeep Code - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

The P0137 code for Jeep vehicles indicates an issue with the O2 sensor circuit low voltage for Bank 1 Sensor 2. Common causes include Faulty O2 Sensor: The most common cause of the P0137 code is a defective O2 sensor that is sending incorrect voltage signals, Wiring Issues: Damaged or corroded wiring connections, harnesses, or connectors can disrupt the signal between the O2 sensor and ECM, Exhaust System Leaks: Any leaks in the exhaust system, such as cracks or holes, can affect the O2 sensor readings and trigger the code. 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 Jeep indicates O2 Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty O2 Sensor: The most common cause of the P0137 code is a defective O2 sensor that is sending incorrect voltage signals, Wiring Issues: Damaged or corroded wiring connections, harnesses, or connectors can disrupt the signal between the O2 sensor and ECM, Exhaust System Leaks: Any leaks in the exhaust system, such as cracks or holes, can affect the O2 sensor readings and trigger the code.
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 08, 2024
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Code P0137 Jeep Description

The P0137 code for Jeep vehicles indicates an issue with the O2 sensor circuit low voltage for Bank 1 Sensor 2. The O2 sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases, which helps the engine control module (ECM) adjust the air-fuel mixture for optimal combustion. Bank 1 Sensor 2 refers to the downstream O2 sensor located after the catalytic converter in the exhaust system.

OBDII Code P0137 Jeep - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2
P0137 Jeep Code - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2

Common Causes of P0137 Jeep

  1. Faulty O2 Sensor: The most common cause of the P0137 code is a defective O2 sensor that is sending incorrect voltage signals.
  2. Wiring Issues: Damaged or corroded wiring connections, harnesses, or connectors can disrupt the signal between the O2 sensor and ECM.
  3. Exhaust System Leaks: Any leaks in the exhaust system, such as cracks or holes, can affect the O2 sensor readings and trigger the code.
  4. Engine Misfires: Persistent engine misfires can lead to an imbalance in the air-fuel mixture, impacting the O2 sensor's performance.
  5. ECM Malfunction: A malfunctioning engine control module can also cause irregular voltage readings from the O2 sensor.

Symptoms of P0137 Jeep

  1. Check Engine Light: The most common symptom associated with the P0137 code is the illumination of the check engine light on the dashboard.
  2. Poor Fuel Economy: A faulty O2 sensor can lead to incorrect fuel mixture adjustments, causing decreased fuel efficiency.
  3. Rough Idling: The engine may experience rough idling or stalling due to improper air-fuel ratios.
  4. Hesitation or Surging: The vehicle may exhibit hesitation or surging under acceleration or at constant speeds.
  5. Increased Emissions: A malfunctioning O2 sensor can result in higher emissions output, potentially causing the vehicle to fail emissions testing.

How to Fix P0137 Jeep

  1. Diagnostic Check: Begin by using an OBD-II scanner to retrieve the specific code and verify the issue with the O2 sensor.
  2. O2 Sensor Replacement: Replace the Bank 1 Sensor 2 O2 sensor with a new, OEM-quality sensor to ensure accurate readings.
  3. Check Wiring: Inspect the wiring harness, connectors, and terminals for any damage or corrosion, repairing or replacing as needed.
  4. Exhaust System Inspection: Check the exhaust system for leaks or damage that may be affecting the O2 sensor readings.
  5. Clear Codes: After completing the repair, clear the diagnostic trouble codes using the OBD-II scanner to reset the ECM and monitor the system for any recurring issues.

Cost to Fix P0137 Jeep

The cost estimate for addressing the P0137 code in a Jeep vehicle can vary depending on factors such as the model, labor rates, and the quality of parts used. On average, the total repair cost for replacing the O2 sensor and addressing any related issues can range from $150 to $400. This estimate includes the cost of the O2 sensor, labor charges, diagnostics, and potential wiring repairs. It is advisable to consult a certified mechanic or auto repair shop for a more accurate cost estimate based on the specific vehicle and location.

What does this mean?

Tech Notes for P0137 Jeep

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





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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 Jeep Code

1. What are the common symptoms of OBDII code P0137 Jeep?

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

2. What does the OBDII code P0137 Jeep, O2 Sensor Circuit Low Voltage Bank 1 Sensor 2, indicate?

- This code indicates that the oxygen sensor downstream of the catalytic converter in bank 1 is reporting a low voltage signal.

3. What are the possible causes of OBDII code P0137 Jeep?

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

4. How can I diagnose the O2 sensor circuit low voltage issue in my Jeep?

- You can diagnose the issue by using an OBDII scanner to read the fault code, inspecting the wiring and connectors for damage, and testing the oxygen sensor's voltage output.

5. Can I drive my Jeep with the OBDII code P0137 without immediate repair?

- It is not recommended to drive your Jeep with this code for an extended period as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair OBDII code P0137 in my Jeep?

- To repair this code, you may need to replace the oxygen sensor in bank 1 sensor 2, repair any damaged wiring or connectors, and clear the fault code using an OBDII scanner.

7. Can a dirty or clogged catalytic converter cause OBDII code P0137 in a Jeep?

- Yes, a dirty or clogged catalytic converter can cause incorrect readings from the oxygen sensor, leading to the triggering of code P0137.

8. Will resetting the Check Engine Light make OBDII code P0137 go away permanently?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing P0137 is not addressed, the code is likely to return.

9. How do I know if the oxygen sensor needs replacement for OBDII code P0137?

- If the oxygen sensor is found to have a low voltage output during diagnostics, or if it is damaged or aged, it may need to be replaced to resolve code P0137.

10. Can a DIY enthusiast fix OBDII code P0137 in a Jeep?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to fix this code by replacing the oxygen sensor and addressing any related wiring issues.

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