AutoCodes – Toyota – P0133 2002 Toyota Corolla

P0133 2002 Toyota Corolla Code - HO2S11 Circuit Slow Response 3ZZ-FE Engine

Quick Answer

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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: P0133 2002 Toyota Corolla indicates HO2S11 Circuit Slow Response 3ZZ-FE Engine .
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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 5,310

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
Cost to Diagnose
FAQs
Comments
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Code P0133 2002 Toyota Corolla Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio.
Lean 0.35 V or less
Rich 0.45 V or more

OBDII Code P0133 2002 Toyota Corolla - HO2S11 Circuit Slow Response 3ZZ-FE Engine - AutoCodes.com — P0133 2002 Toyota Corolla Code - HO2S11 Circuit Slow Response 3ZZ-FE Engine

What does this mean?

What are the Possible Causes of the DTC P0133 2002 Toyota Corolla?

Faulty Front Heated Oxygen Sensor Bank 1
Front Heated Oxygen Sensor Bank 1 harness is open or shorted
Front 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 P0133 2002 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0133 2002 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 P0133 2002 Toyota Corolla 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 P0133 2002 Toyota Corolla Code

1. What does the OBDII code P0133 for a 2002 Toyota Corolla with a 3ZZ-FE engine indicate?

The code P0133 indicates a slow response from the HO2S11 (Heated Oxygen Sensor Bank 1 Sensor 1) circuit.

2. What are some common symptoms of the P0133 code in a 2002 Toyota Corolla?

Common symptoms of the P0133 code in a 2002 Toyota Corolla include poor fuel economy, rough idling, and potential misfires.

3. What are the possible causes of the P0133 code in a 2002 Toyota Corolla?

Possible causes of the P0133 code in a 2002 Toyota Corolla include a faulty oxygen sensor, wiring issues, exhaust leaks, or problems with the engine's air-fuel mixture.

4. How can I diagnose the P0133 code in my 2002 Toyota Corolla?

Diagnosing the P0133 code 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 air-fuel mixture.

5. How can I repair the P0133 code in my 2002 Toyota Corolla?

To repair the P0133 code, you may need to replace the HO2S11 sensor, repair any damaged wiring, fix exhaust leaks, or adjust the engine's air-fuel mixture as necessary.

6. Can a dirty air filter cause the P0133 code in a 2002 Toyota Corolla?

A dirty air filter can indirectly contribute to the P0133 code by affecting the engine's air-fuel mixture, but it is not a direct cause of the code.

7. Is it safe to continue driving my 2002 Toyota Corolla with the P0133 code?

It is not recommended to continue driving your 2002 Toyota Corolla with the P0133 code unresolved, as it can lead to decreased fuel efficiency and potential engine performance issues.

8. How much does it typically cost to repair the P0133 code in a 2002 Toyota Corolla?

The cost to repair the P0133 code in a 2002 Toyota Corolla can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Will resetting the OBDII system clear the P0133 code in my 2002 Toyota Corolla?

Resetting the OBDII system may temporarily clear the P0133 code, but it is important to diagnose and address the underlying issue to prevent the code from reoccurring.

10. Can a DIY enthusiast repair the P0133 code in a 2002 Toyota Corolla?

Depending on your level of experience and access to tools, a DIY enthusiast may be able to replace the oxygen sensor or address wiring issues related to the P0133 code in a 2002 Toyota Corolla.