AutoCodes – Chevrolet – P013B Chevrolet

P013B Chevrolet Code - HO2S Slow Response Lean to Rich Bank 1 Sensor 2

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Bank 1 Sensor 2, Heated Oxygen Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Bank 1 Sensor 2 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: P013B Chevrolet indicates HO2S Slow Response Lean to Rich Bank 1 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 1 Sensor 2, Heated Oxygen Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Bank 1 Sensor 2 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 19,001

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 28, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P013B Chevrolet 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 accumulated mass airflow monitored during lean-to-rich transitions between 350 - 650 mV is greater than calibrated value.

OBDII Code P013B Chevrolet - HO2S Slow Response Lean to Rich Bank 1 Sensor 2 - AutoCodes.com — P013B Chevrolet Code - HO2S Slow Response Lean to Rich Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P013B Chevrolet?

Faulty Heated Oxygen Bank 1 Sensor 2
Heated Oxygen Bank 1 Sensor 2 harness is open or shorted
Heated Oxygen Bank 1 Sensor 2 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 P013B Chevrolet?

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 Rear Heated Oxygen Sensors (HO2S) usually takes care of the problem.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P013B Chevrolet 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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Information for Specific Chevrolet Models

P013B 2014 Chevrolet Silverado — HO2S Slow Response Lean to Rich Bank 1 Sensor 2
P013B 2015 Chevrolet Silverado — HO2S Slow Response Lean to Rich Bank 1 Sensor 2
P013B 2016 Chevrolet Silverado — HO2S Slow Response Lean to Rich Bank 1 Sensor 2
P013B 2017 Chevrolet Silverado — HO2S Slow Response Lean to Rich Bank 1 Sensor 2
P013B 2018 Chevrolet Silverado — HO2S Slow Response Lean to Rich Bank 1 Sensor 2

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 P013B Chevrolet Code

1. What are the common symptoms of OBDII code P013B in a Chevrolet?

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

2. What does the OBDII code P013B indicating "HO2S Slow Response Lean to Rich Bank 1 Sensor 2" mean?

- This code indicates that the downstream oxygen sensor in Bank 1, located after the catalytic converter, is responding slowly as the air-fuel mixture transitions from lean to rich.

3. What are the possible causes of OBDII code P013B in a Chevrolet?

- Possible causes include a faulty oxygen sensor, exhaust leaks, issues with the catalytic converter, fuel system problems, or wiring issues.

4. How can I diagnose the OBDII code P013B in my Chevrolet?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the oxygen sensor's wiring and connections, inspecting the exhaust system for leaks, and testing the sensor's response time.

5. Can I drive my Chevrolet with the OBDII code P013B?

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

6. How do I repair OBDII code P013B in my Chevrolet?

- Repair may involve replacing the Bank 1 Sensor 2 oxygen sensor, fixing any exhaust leaks, addressing fuel system issues, or resolving wiring problems as needed.

7. Will resetting the Check Engine Light resolve OBDII code P013B in my Chevrolet?

- Resetting the light may temporarily turn it off, but it will not fix the underlying issue causing the code. It is important to diagnose and repair the problem to prevent further issues.

8. Is it safe to continue driving my Chevrolet if the Check Engine Light is on due to code P013B?

- While it may be safe to drive for a short distance, it is recommended to address the issue promptly to prevent potential long-term damage and maintain optimal vehicle performance.

9. What is the role of the downstream oxygen sensor in Bank 1 Sensor 2 in the vehicle's exhaust system?

- The downstream oxygen sensor monitors the efficiency of the catalytic converter by detecting the oxygen levels in the exhaust gases after they have passed through the converter.

10. How can I prevent OBDII code P013B from occurring in my Chevrolet in the future?

- Regular maintenance, such as replacing oxygen sensors at recommended intervals, addressing exhaust leaks promptly, and ensuring proper fuel system operation, can help prevent this code from recurring.