AutoCodes – Toyota – P0137 2005 Toyota Highlander

P0137 2005 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 2005 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 8,902

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 2005 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 2005 Toyota Highlander - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com — P0137 2005 Toyota Highlander Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0137 2005 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 2005 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.

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 2005 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 2005 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 2005 Toyota Highlander Code

1. What does OBDII code P0137 for a 2005 Toyota Highlander mean?

Code P0137 indicates a low voltage condition in the oxygen sensor circuit for Bank 1 Sensor 2 in a 2005 Toyota Highlander.

2. What are the common symptoms of OBDII code P0137 in a 2005 Toyota Highlander?

Common symptoms of code P0137 include decreased fuel efficiency, rough idling, and the illumination of the check engine light on the dashboard.

3. What are the possible causes of OBDII code P0137 in a 2005 Toyota Highlander?

Possible causes of code P0137 can include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's fuel system.

4. How can I diagnose the OBDII code P0137 in a 2005 Toyota Highlander?

Diagnosing code P0137 involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related wiring, checking for exhaust leaks, and testing the sensor's voltage output.

5. What are the repair options for fixing OBDII code P0137 in a 2005 Toyota Highlander?

Repair options for code P0137 may include replacing the oxygen sensor, repairing or replacing damaged wiring or connectors, fixing any exhaust leaks, and ensuring proper functioning of the fuel system.

6. Can I drive my 2005 Toyota Highlander with OBDII code P0137?

It is generally not recommended to drive a vehicle with an unresolved OBDII code like P0137, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

7. How much does it cost to fix OBDII code P0137 in a 2005 Toyota Highlander?

The cost of fixing code P0137 can vary depending on the specific cause of the issue, the parts needed for repair, and the labor rates of the repair shop. It's advisable to obtain quotes from local mechanics.

8. Is it possible to reset OBDII code P0137 in a 2005 Toyota Highlander?

While clearing the code using an OBDII scanner can temporarily turn off the check engine light, it will not fix the underlying issue causing code P0137. The problem should be diagnosed and repaired.

9. How often does OBDII code P0137 occur in a 2005 Toyota Highlander?

Code P0137 can occur sporadically or persistently, depending on the root cause of the issue. Regular maintenance and timely repairs can help prevent the recurrence of this code.

10. Can a DIY enthusiast fix OBDII code P0137 in a 2005 Toyota Highlander?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P0137. However, complex issues like sensor replacement or wiring repairs may be best left to professionals.