AutoCodes – Volkswagen – P0133 Volkswagen

P0133 Volkswagen 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 Volkswagen 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.

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Code Popularity 21,421

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

What does this mean?

What are the Possible Causes of the DTC P0133 Volkswagen?

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 Volkswagen?

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 Volkswagen 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.

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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 Volkswagen Code

1. What are the common symptoms of OBDII code P0133 in a Volkswagen?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and potentially increased emissions.

2. What does the HO2S11 sensor circuit slow response mean in the context of OBDII code P0133 for a Volkswagen?

- It indicates that the oxygen sensor (bank 1, sensor 1) is taking too long to respond to changes in the air-fuel mixture.

3. What are the possible causes of OBDII code P0133 in a Volkswagen?

- Potential causes include a faulty oxygen sensor, wiring issues, exhaust leaks, vacuum leaks, or an engine misfire.

4. How can I diagnose the HO2S11 sensor circuit slow response issue in my Volkswagen?

- Diagnosis typically involves checking the oxygen sensor's voltage readings, inspecting the sensor's wiring, and looking for any exhaust or vacuum leaks.

5. Can a dirty or contaminated oxygen sensor trigger OBDII code P0133 in a Volkswagen?

- Yes, a dirty or contaminated oxygen sensor can lead to slow response times and trigger the P0133 trouble code.

6. How critical is it to address OBDII code P0133 in a Volkswagen promptly?

- It is essential to address P0133 promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

7. What are some repair tips for resolving OBDII code P0133 in a Volkswagen?

- Repair tips may include cleaning or replacing the oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, and addressing any underlying engine issues.

8. Can driving with OBDII code P0133 cause further damage to the vehicle?

- Continuing to drive with code P0133 may lead to reduced fuel efficiency, increased emissions, and potential damage to the catalytic converter over time.

9. How much can I expect to pay to fix OBDII code P0133 in my Volkswagen?

- The cost of fixing P0133 can vary depending on the underlying cause, but it may range from a few hundred to a few thousand dollars, including parts and labor.

10. Is it possible to reset the OBDII code P0133 in a Volkswagen without fixing the underlying issue?

- While you can reset the code using an OBDII scanner, it is crucial to address the root cause to prevent the issue from recurring and potentially causing more significant problems.