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

Quick Answer

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection. 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 Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection.
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.
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Code Popularity 30,911
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on May 27, 2022
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Code P0137 Jeep Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.
OBDII Code P0137 Jeep - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com
P0137 Jeep Code - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2
What does this mean?

What are the Possible Causes of the DTC P0137 Jeep?

  • Faulty Rear Heated Oxygen Sensor Bank 1
  • Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How to Fix the DTC P0137 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0137 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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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