AutoCodes – Toyota – P0137 2006 Toyota Highlander

P0137 2006 Toyota Highlander 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 2006 Toyota Highlander 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 4,867
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0137 2006 Toyota Highlander 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 2006 Toyota Highlander - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com
P0137 2006 Toyota Highlander Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

What are the Possible Causes of the DTC P0137 2006 Toyota Highlander?

  • 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 2006 Toyota Highlander?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0137 2006 Toyota Highlander 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.

Need more information about the P0137 2006 Toyota Highlander code?

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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 2006 Toyota Highlander Code

1. What are common symptoms of OBDII code P0137 in a 2006 Toyota Highlander?

- Common symptoms include poor fuel economy, rough idling, and potential issues with the vehicle's emission levels.

2. What does the OBDII code P0137 on a 2006 Toyota Highlander indicate?

- The code P0137 indicates a low voltage condition in the oxygen sensor circuit of Bank 1 Sensor 2 in the vehicle's exhaust system.

3. What are the possible causes of OBDII code P0137 in a 2006 Toyota Highlander?

- Possible causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, or problems with the engine's fuel system.

4. How can I diagnose the OBDII code P0137 in my 2006 Toyota Highlander?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, visually inspecting the oxygen sensor and related wiring, and conducting voltage tests.

5. Can I drive my 2006 Toyota Highlander with an OBDII code P0137?

- It is not recommended to drive the vehicle with a P0137 code for an extended period as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How do I repair OBDII code P0137 in my 2006 Toyota Highlander?

- Repair may involve replacing the Bank 1 Sensor 2 oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or addressing issues in the fuel system.

7. Is it possible to reset the OBDII code P0137 in a 2006 Toyota Highlander without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, the issue causing the code will persist until properly diagnosed and repaired.

8. Can a dirty or clogged air filter trigger the OBDII code P0137 in a 2006 Toyota Highlander?

- While a dirty air filter can affect engine performance, it is not a direct cause of the P0137 code. Focus on checking the oxygen sensor and related components.

9. How long does it typically take to repair OBDII code P0137 in a 2006 Toyota Highlander?

- Repair time can vary based on the exact cause of the code and the availability of parts, but it generally takes a few hours to a day to diagnose and fix the issue.

10. Will fixing the OBDII code P0137 in my 2006 Toyota Highlander improve the vehicle's overall performance?

- Yes, repairing the P0137 code can lead to better fuel efficiency, smoother engine operation, and ensure the vehicle meets emission standards.

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