AutoCodes – Toyota – P0136 2006 Toyota Corolla

P0136 2006 Toyota Corolla Code - HO2S12 Circuit Malfunction 3ZZ-FE Engine

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: P0136 2006 Toyota Corolla indicates HO2S12 Circuit Malfunction 3ZZ-FE Engine.
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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 5,298

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0136 2006 Toyota Corolla 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 P0136 2006 Toyota Corolla - HO2S12 Circuit Malfunction 3ZZ-FE Engine - AutoCodes.com — P0136 2006 Toyota Corolla Code - HO2S12 Circuit Malfunction 3ZZ-FE Engine

What does this mean?

What are the Possible Causes of the DTC P0136 2006 Toyota Corolla?

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
EFI relay

How to Fix the DTC P0136 2006 Toyota Corolla?

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 P0136 2006 Toyota Corolla 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 P0136 2006 Toyota Corolla code?

Need more information on how to fix the P0136 2006 Toyota Corolla code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0136 2006 Toyota Corolla 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 P0136 2006 Toyota Corolla Code

1. What does the OBDII code P0136 for a 2006 Toyota Corolla mean?

The OBDII code P0136 for a 2006 Toyota Corolla indicates a malfunction in the HO2S12 (Heated Oxygen Sensor Bank 1 Sensor 2) circuit.

2. What are the common symptoms of a P0136 error code in a 2006 Toyota Corolla?

Common symptoms of a P0136 error code in a 2006 Toyota Corolla may include poor fuel economy, rough idling, engine misfires, and an illuminated check engine light.

3. What are some possible causes of the P0136 error code in a 2006 Toyota Corolla with a 3ZZ-FE engine?

Possible causes of the P0136 error code in a 2006 Toyota Corolla with a 3ZZ-FE engine include a faulty HO2S12 sensor, wiring issues, exhaust leaks, or a problem with the engine control module (ECM).

4. How can I diagnose a P0136 error code in my 2006 Toyota Corolla?

To diagnose a P0136 error code, you can use an OBDII scanner to read the code and determine the specific issue. Additionally, checking the wiring and connections to the HO2S12 sensor can help identify any potential problems.

5. Is it safe to continue driving my 2006 Toyota Corolla with a P0136 error code?

It is generally not recommended to continue driving your 2006 Toyota Corolla with a P0136 error code, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair a P0136 error code in my 2006 Toyota Corolla?

Repairing a P0136 error code in a 2006 Toyota Corolla may involve replacing the HO2S12 sensor, repairing any damaged wiring or connections, addressing exhaust leaks, or reprogramming the engine control module (ECM).

7. Can I reset the check engine light after fixing a P0136 error code in my 2006 Toyota Corolla?

Yes, you can reset the check engine light after fixing a P0136 error code in your 2006 Toyota Corolla by using an OBDII scanner to clear the code.

8. How much does it typically cost to repair a P0136 error code in a 2006 Toyota Corolla?

The cost of repairing a P0136 error code in a 2006 Toyota Corolla can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

9. Are there any preventive maintenance measures to avoid a P0136 error code in a 2006 Toyota Corolla?

To prevent a P0136 error code in your 2006 Toyota Corolla, it's important to perform regular maintenance checks, including inspecting the oxygen sensors and exhaust system for any signs of wear or damage.

10. How long does it take to repair a P0136 error code in a 2006 Toyota Corolla?

The time it takes to repair a P0136 error code in a 2006 Toyota Corolla can vary depending on the specific issue and the expertise of the mechanic, but it typically takes 1-2 hours to diagnose and fix the problem.