AutoCodes – Isuzu – P0133 Isuzu

P0133 Isuzu Code - HO2S Slow Response Sensor 1

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 Isuzu indicates HO2S Slow Response 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.

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Code Popularity 8,216

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 Isuzu 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 Isuzu - HO2S Slow Response Sensor 1 - AutoCodes.com — P0133 Isuzu Code - HO2S Slow Response Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0133 Isuzu?

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 Isuzu?

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 Isuzu 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 Isuzu Code

1. What does OBDII code P0133 for Isuzu mean?

- OBDII code P0133 for Isuzu indicates a slow response from the HO2S (Heated Oxygen Sensor) located before the catalytic converter on bank 1, sensor 1.

2. What are the common symptoms of a P0133 code in an Isuzu vehicle?

- Common symptoms include reduced fuel efficiency, engine hesitation, rough idling, and the illumination of the Check Engine Light.

3. What are the possible causes of the HO2S slow response sensor 1 error code in an Isuzu?

- Potential causes include a faulty oxygen sensor, wiring issues, exhaust leaks, vacuum leaks, or a malfunctioning engine control module (ECM).

4. How can I diagnose the cause of a P0133 code in my Isuzu?

- You can diagnose the issue by conducting a visual inspection of the oxygen sensor and its wiring, checking for exhaust leaks, conducting a scan tool test, or performing voltage and resistance tests.

5. Can I continue driving my Isuzu with a P0133 code?

- It is not recommended to drive your Isuzu with a P0133 code for an extended period as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair a HO2S slow response sensor 1 issue in my Isuzu?

- Repair options include replacing the oxygen sensor, repairing any wiring faults, fixing exhaust leaks, or resetting the ECM after addressing the underlying issue.

7. Will resetting the Check Engine Light fix a P0133 code in my Isuzu?

- Simply resetting the Check Engine Light will not fix the underlying issue causing the P0133 code. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

8. How much does it cost to fix a P0133 code in an Isuzu?

- The cost of fixing a P0133 code in an Isuzu can vary depending on the underlying cause and whether you choose to address the issue yourself or seek professional help. Costs may include parts and labor.

9. Can a P0133 code in an Isuzu cause emissions test failure?

- Yes, a P0133 code can cause your Isuzu to fail an emissions test due to the potential impact on the vehicle's emissions control system.

10. How often should I replace the oxygen sensor in my Isuzu to prevent P0133 codes?

- It is recommended to follow the manufacturer's guidelines for oxygen sensor replacement, usually between 60,000 to 100,000 miles, to help prevent issues like the P0133 code from occurring.