AutoCodes – GMC – P014B GMC

P014B GMC Code - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 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: P014B GMC indicates HO2S Delayed Response Lean to Rich Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 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 1,309

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 P014B GMC 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 O2 sensor voltage has not increased above 350 mV within a calibrated value of accumulated airflow.

OBDII Code P014B GMC - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2 - AutoCodes.com — P014B GMC Code - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P014B GMC?

Faulty Heated Oxygen Bank 2 Sensor 2
Heated Oxygen Bank 2 Sensor 2 harness is open or shorted
Heated Oxygen Bank 2 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 P014B GMC?

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 P014B GMC 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 P014B GMC code?

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Information for Specific GMC Models

P014B 2014 GMC Sierra — HO2S Delayed Response Lean to Rich Bank 2 Sensor 2
P014B 2015 GMC Sierra — HO2S Delayed Response Lean to Rich Bank 2 Sensor 2
P014B 2016 GMC Sierra — HO2S Delayed Response Lean to Rich Bank 2 Sensor 2
P014B 2017 GMC Sierra — HO2S Delayed Response Lean to Rich Bank 2 Sensor 2
P014B 2018 GMC Sierra — HO2S Delayed Response Lean to Rich Bank 2 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 P014B GMC Code

1. What are the common symptoms of OBDII code P014B GMC?

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

2. What does the OBDII code P014B GMC indicate?

- This code indicates a delayed response from the Bank 2 Sensor 2 oxygen sensor, signaling a lean to rich condition.

3. What can cause the OBDII code P014B GMC to trigger?

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

4. How can I diagnose the OBDII code P014B GMC?

- You can diagnose this code by using an OBDII scanner to read the code, inspecting the oxygen sensor and related components for any visible damage, and checking for leaks in the exhaust system.

5. What are some repair tips for resolving OBDII code P014B GMC?

- Repair tips include replacing the Bank 2 Sensor 2 oxygen sensor, fixing any exhaust leaks, addressing fuel system issues, repairing vacuum leaks, and inspecting the catalytic converter.

6. Can I drive my vehicle with the OBDII code P014B GMC illuminated?

- It is not recommended to drive with this code illuminated as it can lead to further damage to the engine and emission control system.

7. How urgent is it to address the OBDII code P014B GMC?

- It is important to address this code promptly to prevent potential damage to the engine and ensure optimal fuel efficiency and performance.

8. Can I reset the Check Engine Light after repairing OBDII code P014B GMC?

- Yes, you can reset the Check Engine Light using an OBDII scanner after repairing the issue causing the P014B code.

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

- The Bank 2 Sensor 2 oxygen sensor monitors the exhaust gases to ensure the proper air-fuel ratio and efficient operation of the catalytic converter.

10. How can regular maintenance help prevent OBDII code P014B GMC from occurring?

- Regular maintenance, including checking and replacing oxygen sensors as recommended, can help prevent issues like the P014B code from occurring by ensuring proper engine performance and emissions control.