AutoCodes – Toyota – P0137 2007 Toyota Prius

P0137 2007 Toyota Prius Code - Oxygen 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 2007 Toyota Prius indicates Oxygen 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 8,198

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0137 2007 Toyota Prius 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 2007 Toyota Prius - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com — P0137 2007 Toyota Prius Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0137 2007 Toyota Prius?

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 2007 Toyota Prius?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0137 2007 Toyota Prius 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 2007 Toyota Prius Code

1. What does OBDII code P0137 mean for a 2007 Toyota Prius?

Code P0137 indicates a low voltage condition in the oxygen sensor circuit of Bank 1 Sensor 2 in a 2007 Toyota Prius.

2. What are the common symptoms of OBDII code P0137 in a 2007 Toyota Prius?

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 OBDII code P0137 in a 2007 Toyota Prius?

Potential causes include a faulty oxygen sensor, wiring issues, exhaust leaks, engine misfires, or a malfunctioning catalytic converter.

4. How can I diagnose the cause of OBDII code P0137 in my 2007 Toyota Prius?

Diagnosis typically involves checking the oxygen sensor's voltage output, inspecting the sensor's wiring for damage, conducting a visual inspection of the exhaust system, and scanning for any related trouble codes.

5. Can I drive my 2007 Toyota Prius with OBDII code P0137?

It is generally safe to drive the vehicle with code P0137, but 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 OBDII code P0137 in a 2007 Toyota Prius?

Repair options may include replacing the Bank 1 Sensor 2 oxygen sensor, repairing damaged wiring, fixing exhaust leaks, addressing engine misfires, or replacing a faulty catalytic converter.

7. Will resetting the Check Engine Light resolve OBDII code P0137 in a 2007 Toyota Prius?

Simply clearing the code may temporarily turn off the Check Engine Light, but it will not fix the underlying issue causing code P0137. Proper diagnosis and repair are necessary for a permanent solution.

8. How much does it cost to fix OBDII code P0137 in a 2007 Toyota Prius?

The cost of repairing code P0137 can vary depending on the root cause of the issue. It can range from a simple oxygen sensor replacement to more complex repairs involving the exhaust system.

9. Can a DIY enthusiast fix OBDII code P0137 in a 2007 Toyota Prius?

Depending on the cause, some DIY enthusiasts with automotive repair experience might be able to address code P0137 themselves by replacing the oxygen sensor or addressing wiring issues. However, complex issues may require professional assistance.

10. How often does OBDII code P0137 occur in a 2007 Toyota Prius?

Code P0137 can occur intermittently or persistently, depending on the cause. Regular maintenance and prompt addressing of related symptoms can help prevent the recurrence of this code in a 2007 Toyota Prius.