AutoCodes – Pontiac – P0133 Pontiac

P0133 Pontiac Code - HO2S Slow Response Bank 1 Sensor 1

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. 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 Pontiac indicates HO2S Slow Response Bank 1 Sensor 1.
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 8,809

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 May 27, 2022

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 Pontiac Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the Engine Control Module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0 - 1, 000 mV. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1, 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value for greater than 60s.

OBDII Code P0133 Pontiac - HO2S Slow Response Bank 1 Sensor 1 - AutoCodes.com — P0133 Pontiac Code - HO2S Slow Response Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0133 Pontiac?

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
Low or high fuel system pressure
Fuel contamination
Faulty fuel injectors
Exhaust gas leaks
Engine vacuum leaks

How to Fix the DTC P0133 Pontiac?

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 Sensors (HO2S) usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0133 Pontiac 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 Pontiac code?

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

Need Help with the Code?

Get the P0133 Pontiac 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 Pontiac Code

1. What are the common symptoms of OBDII code P0133 in a Pontiac related to HO2S Slow Response Bank 1 Sensor 1?

- Common symptoms include poor fuel economy, rough idling, and hesitation during acceleration.

2. What are the possible causes of the P0133 code in a Pontiac, indicating HO2S Slow Response Bank 1 Sensor 1?

- Potential causes include a faulty oxygen sensor, issues with the wiring or connectors, a vacuum leak, or a problem with the fuel system.

3. How can I diagnose the P0133 code in my Pontiac, specifically for HO2S Slow Response Bank 1 Sensor 1?

- A thorough inspection of the oxygen sensor, wiring, and connectors is recommended. Checking for vacuum leaks or fuel system issues is also important.

4. What repair tips can help fix the P0133 code in a Pontiac related to HO2S Slow Response Bank 1 Sensor 1?

- Repair tips include replacing the oxygen sensor, repairing any damaged wiring or connectors, fixing vacuum leaks, and addressing fuel system issues.

5. Can I drive my Pontiac with the P0133 code indicating HO2S Slow Response Bank 1 Sensor 1?

- It is not recommended to drive the vehicle with this code present, as it can lead to decreased fuel efficiency and potential engine damage if left unresolved.

6. How critical is it to address the P0133 code in a Pontiac related to HO2S Slow Response Bank 1 Sensor 1?

- It is important to address this code promptly to prevent further issues with engine performance and fuel efficiency.

7. Will resetting the OBDII system clear the P0133 code for HO2S Slow Response Bank 1 Sensor 1 in my Pontiac?

- While resetting the system may temporarily clear the code, it is not a permanent solution. The underlying issue causing the code should be diagnosed and repaired.

8. How much can I expect to pay for repairs related to the P0133 code in a Pontiac with HO2S Slow Response Bank 1 Sensor 1?

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

9. Are there any preventative maintenance steps I can take to avoid the P0133 code in my Pontiac?

- Regularly checking and maintaining the oxygen sensors, as well as ensuring the fuel system is in good condition, can help prevent the occurrence of this code.

10. Can a DIY enthusiast address the P0133 code in a Pontiac related to HO2S Slow Response Bank 1 Sensor 1?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the issue themselves. However, it is recommended to seek professional assistance if unsure.