AutoCodes – GMC – P014B 2017 GMC Sierra

P014B 2017 GMC Sierra 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 2017 GMC Sierra 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 177

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 2017 GMC Sierra 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 2017 GMC Sierra - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2 - AutoCodes.com — P014B 2017 GMC Sierra Code - HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P014B 2017 GMC Sierra?

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 2017 GMC Sierra?

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 2017 GMC Sierra 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 P014B 2017 GMC Sierra Code

1. What does the OBDII code P014B mean for a 2017 GMC Sierra?

P014B indicates a "HO2S Delayed Response Lean to Rich Bank 2 Sensor 2," meaning the oxygen sensor on Bank 2 (downstream) is taking too long to detect changes in air-fuel mixture.

2. What are the common symptoms of a P014B code?

Symptoms may include the check engine light turning on, reduced fuel efficiency, rough idling, or failed emissions tests.

3. What causes the P014B code to appear?

Common causes include a faulty downstream oxygen sensor (Bank 2 Sensor 2), exhaust leaks, wiring issues, or a problem with the engine's air-fuel mixture.

4. How do I diagnose the P014B code on my 2017 GMC Sierra?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the oxygen sensor and wiring for damage, and checking for exhaust leaks or fuel system issues.

5. Can I drive my 2017 GMC Sierra with a P014B code?

While the vehicle may still be drivable, prolonged driving with this code can lead to reduced fuel efficiency and potential damage to the catalytic converter.

6. How do I fix the P014B code?

Repairs may include replacing the oxygen sensor (Bank 2 Sensor 2), repairing damaged wiring, fixing exhaust leaks, or addressing issues with the air-fuel mixture.

7. How much does it cost to fix the P014B code?

Repair costs vary but typically range from $150 to $300 for an oxygen sensor replacement, depending on labor rates and parts costs.

8. Can a dirty air filter cause a P014B code?

While unlikely, a dirty air filter can affect the air-fuel mixture, which might contribute to related sensor issues. Itâ€™s worth inspecting during diagnosis.

9. Do I need to replace the catalytic converter for a P014B code?

Not necessarily. The catalytic converter is rarely the direct cause of this code unless itâ€™s severely damaged. Focus on the oxygen sensor and related components first.

10. How can I prevent the P014B code from recurring?

Regular maintenance, such as inspecting oxygen sensors, ensuring proper air-fuel mixture, and addressing exhaust issues promptly, can help prevent this code.