AutoCodes – Toyota – P0137 2004 Toyota Prius

P0137 2004 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 2004 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,520
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P0137 2004 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 2004 Toyota Prius - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2 - AutoCodes.com
P0137 2004 Toyota Prius Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2

What are the Possible Causes of the DTC P0137 2004 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 2004 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0137 2004 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.

Need more information about the P0137 2004 Toyota Prius code?

Need more information on how to fix the P0137 2004 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0137 2004 Toyota Prius code diagnosed by a professional: Find a repair shop in your area

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 2004 Toyota Prius Code

1. What does the OBDII code P0137 mean for a 2004 Toyota Prius?

The code P0137 indicates a low voltage condition in the oxygen sensor circuit of Bank 1 Sensor 2 in a 2004 Toyota Prius.

2. What are the common symptoms associated with OBDII code P0137 in a 2004 Toyota Prius?

Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light.

3. What are the possible causes of OBDII code P0137 in a 2004 Toyota Prius?

The code P0137 in a 2004 Toyota Prius can be caused by a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, or a problem with the vehicle's engine control module (ECM).

4. How can I diagnose the OBDII code P0137 in my 2004 Toyota Prius?

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

5. Can I drive my 2004 Toyota Prius with the OBDII code P0137?

It is not recommended to drive your 2004 Toyota Prius with the code P0137, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.

6. How do I repair OBDII code P0137 in a 2004 Toyota Prius?

Repairing the code P0137 may involve replacing the oxygen sensor, repairing or replacing damaged wiring, fixing any exhaust leaks, or resetting the ECM after addressing the underlying issue.

7. Is it possible to reset the OBDII code P0137 in a 2004 Toyota Prius without fixing the problem?

While you can clear the code with an OBDII scanner, it is crucial to address the root cause of the issue to prevent it from recurring and potentially causing further damage to your vehicle.

8. What is the typical cost to repair OBDII code P0137 in a 2004 Toyota Prius?

The cost to repair the code P0137 in a 2004 Toyota Prius can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. How often does the OBDII code P0137 occur in a 2004 Toyota Prius?

The code P0137 can occur infrequently in a 2004 Toyota Prius, but regular maintenance and timely repairs can help prevent its occurrence.

10. Can a DIY enthusiast fix the OBDII code P0137 in a 2004 Toyota Prius?

While some DIY enthusiasts may have the skills to diagnose and repair the code P0137, it is recommended to consult a professional mechanic for accurate diagnosis and safe repairs.

Discuss the causes and fixes for P0137 2004 Toyota Prius OBDII Code

Code P0137 2004 Toyota Prius comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play