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Engine-Codes – Acura – P0133 Acura

P0133 Acura Code - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response

Quick Answer

The P0133 diagnostic trouble code for Acura vehicles indicates a malfunction or slow response in Air/Fuel Ratio Sensor 1, also known as the upstream oxygen sensor. Common causes include Contaminated sensor due to carbon deposits or oil, Wiring issues such as frayed or damaged wires, Sensor damage from impacts or corrosion. 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 Acura indicates Air/Fuel Ratio Sensor 1 Malfunction/Slow Response.
Common causes
Common causes include Contaminated sensor due to carbon deposits or oil, Wiring issues such as frayed or damaged wires, Sensor damage from impacts or corrosion.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0133 Acura Description

The P0133 diagnostic trouble code for Acura vehicles indicates a malfunction or slow response in Air/Fuel Ratio Sensor 1, also known as the upstream oxygen sensor. This sensor plays a crucial role in monitoring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) for adjusting the air-fuel mixture. A malfunctioning or slow responding sensor can lead to incorrect fuel mixture adjustments, affecting engine performance, fuel efficiency, and emissions.

OBDII Code P0133 Acura - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response
P0133 Acura Code - Air/Fuel Ratio Sensor 1 Malfunction/Slow Response

Common Causes of P0133 Acura

  1. Contaminated sensor due to carbon deposits or oil
  2. Wiring issues such as frayed or damaged wires
  3. Sensor damage from impacts or corrosion
  4. ECM malfunction affecting sensor communication
  5. Exhaust leaks affecting sensor readings

Symptoms of P0133 Acura

  1. Rough idling
  2. Poor acceleration
  3. Decreased fuel efficiency
  4. Increased emissions
  5. Check Engine Light illuminated

How to Fix P0133 Acura

  1. Diagnose the issue by using a scan tool to monitor sensor data and check for any related trouble codes.
  2. Inspect the sensor for contamination, damage, or wiring issues. Clean or replace the sensor as needed.
  3. Check and repair any wiring issues affecting sensor communication.
  4. Test the sensor's response time and accuracy after repairs are made to ensure proper functioning.
  5. Clear the trouble codes and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0133 Acura

The typical repair costs for addressing a P0133 code in an Acura vehicle can range from $200 to $500, including parts and labor. Keep in mind that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Labor rates generally range between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.

What does this mean?

Tech Notes for P0133 Acura

Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem

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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 Acura Code

1. What are common symptoms of OBDII code P0133 in an Acura?

The common symptoms of OBDII code P0133 in an Acura include poor fuel economy, rough idling, and a noticeable decrease in engine performance.

2. What can cause the OBDII code P0133 in an Acura?

The OBDII code P0133 in an Acura is typically caused by a malfunctioning or slow response of the Air/Fuel Ratio Sensor 1, also known as the upstream oxygen sensor.

3. How can I diagnose the OBDII code P0133 in my Acura?

To diagnose the OBDII code P0133 in your Acura, you can use an OBDII scanner to read the code and then inspect the Air/Fuel Ratio Sensor 1 for any signs of damage or contamination.

4. Can a dirty air filter trigger the OBDII code P0133 in an Acura?

Yes, a dirty air filter can affect the air/fuel mixture in the engine, which in turn can cause the OBDII code P0133 to be triggered due to improper readings by the Air/Fuel Ratio Sensor 1.

5. What are some repair tips for fixing the OBDII code P0133 in an Acura?

Some repair tips for fixing the OBDII code P0133 in an Acura include cleaning or replacing the Air/Fuel Ratio Sensor 1, checking for exhaust leaks, and ensuring proper air intake system functionality.

6. Is it safe to continue driving my Acura with the OBDII code P0133?

It is not recommended to continue driving your Acura with the OBDII code P0133, as it can lead to further engine damage and worsen fuel efficiency over time.

7. How much does it typically cost to repair the OBDII code P0133 in an Acura?

The cost to repair the OBDII code P0133 in an Acura can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

8. Can a faulty catalytic converter trigger the OBDII code P0133 in an Acura?

Yes, a faulty catalytic converter can affect the readings of the Air/Fuel Ratio Sensor 1, potentially triggering the OBDII code P0133 in an Acura.

9. How often should the Air/Fuel Ratio Sensor 1 be replaced in an Acura?

The Air/Fuel Ratio Sensor 1 in an Acura should typically be replaced every 60,000 to 100,000 miles, or as recommended in the vehicle's maintenance schedule.

10. Will resetting the OBDII code P0133 in my Acura make it go away permanently?

Resetting the OBDII code P0133 in your Acura may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, the code is likely to reappear.

Discuss the causes and fixes for P0133 Acura OBDII Code

Submit a New Comment

  • i have replaced both oxygen sensors on my 1998 acura 2.5 tl to solve the code p0133 after the engine light being reset the code came back again.what is next now ?

    Reply to Comment

  • If the sensor are OK, the next thing is to check for exhaust leaks or restricted air intake (clogged air filter or damage Mas Air Flow (MAF) sensor)

    Reply to Comment