AutoCodes – Audi – P0133 Audi

P0133 Audi Code - HO2S11 Sensor Circuit Slow Response

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 Audi indicates HO2S11 Sensor Circuit Slow Response.
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.

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 15,672

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 P0133 Audi 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. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P0133 Audi - HO2S11 Sensor Circuit Slow Response - AutoCodes.com — P0133 Audi Code - HO2S11 Sensor Circuit Slow Response

What does this mean?

What are the Possible Causes of the DTC P0133 Audi?

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

How to Fix the DTC P0133 Audi?

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 Front 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 P0133 Audi 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 Audi code?

Need more information on how to fix the P0133 Audi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0133 Audi 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 P0133 Audi Code

1. What are the common symptoms of OBDII code P0133 on an Audi?

- Common symptoms include a decrease in fuel efficiency, rough idling, sluggish acceleration, and the illumination of the check engine light.

2. What does the OBDII code P0133 indicate on an Audi?

- OBDII code P0133 indicates a slow response from the upstream oxygen sensor (HO2S11) in the bank 1 sensor 1 circuit.

3. What are the possible causes of OBDII code P0133 on an Audi?

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

4. How can I diagnose the OBDII code P0133 on my Audi?

- Diagnosing the code involves using an OBDII scanner to read the code, checking the oxygen sensor's voltage readings, inspecting the sensor's wiring, and looking for any exhaust leaks.

5. Can I drive my Audi with the OBDII code P0133 present?

- It is generally safe to drive your Audi with the OBDII code P0133, but it is recommended to address the issue promptly to prevent potential damage to the catalytic converter.

6. How can I repair OBDII code P0133 on my Audi?

- Repair options may include replacing the upstream oxygen sensor, repairing damaged wiring, fixing exhaust leaks, addressing engine misfires, or resolving fuel system issues.

7. Will resetting the check engine light fix OBDII code P0133 on my Audi?

- Simply resetting the check engine light will not fix the underlying issue causing OBDII code P0133. It is important to diagnose and address the root cause of the problem.

8. How much does it cost to repair OBDII code P0133 on an Audi?

- The cost of repairing OBDII code P0133 on an Audi can vary depending on the specific issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P0133 on an Audi?

- Depending on your skills and experience, you may be able to address OBDII code P0133 yourself by replacing the oxygen sensor or checking for basic wiring issues. Advanced diagnostics may require professional help.

10. How often does OBDII code P0133 occur in Audis?

- OBDII code P0133 is a relatively common issue in Audis, especially in older models or those with high mileage. Regular maintenance and prompt repairs can help prevent this code from occurring.