AutoCodes – GMC – P14B6 2014 GMC Sierra

P14B6 2014 GMC Sierra Code - Mass Air Flow Sensor Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Mass Air Flow Sensor, Mass Air Flow Sensor harness is open or shorted, Mass Air Flow Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P14B6 2014 GMC Sierra indicates Mass Air Flow Sensor Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Mass Air Flow Sensor, Mass Air Flow Sensor harness is open or shorted, Mass Air Flow Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 139

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P14B6 2014 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Mass Air Flow Sensor Signal Message Counter is Incorrect.

OBDII Code P14B6 2014 GMC Sierra - Mass Air Flow Sensor Signal Message Counter Incorrect - AutoCodes.com — P14B6 2014 GMC Sierra Code - Mass Air Flow Sensor Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P14B6 2014 GMC Sierra?

Faulty Mass Air Flow Sensor
Mass Air Flow Sensor harness is open or shorted
Mass Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P14B6 2014 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P14B6 2014 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.

Need more information about the P14B6 2014 GMC Sierra code?

Need more information on how to fix the P14B6 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P14B6 2014 GMC Sierra Code

1. What does the OBDII code P14B6 mean on a 2014 GMC Sierra?

P14B6 indicates that the Powertrain Control Module (PCM) has detected an issue with the mass airflow (MAF) sensor signal message counter, meaning the signal received from the MAF sensor is not consistent or valid.

2. What are the common symptoms of P14B6 on a GMC Sierra?

Symptoms may include poor engine performance, rough idling, reduced fuel efficiency, hesitation during acceleration, and the check engine light being illuminated.

3. What causes the P14B6 code to appear?

Common causes include a faulty mass airflow sensor, wiring issues such as damaged or corroded connectors, software glitches in the PCM, or a dirty or obstructed MAF sensor.

4. Can a dirty air filter cause the P14B6 code?

Yes, a dirty or clogged air filter can restrict airflow and cause the MAF sensor to send incorrect signals, potentially triggering the P14B6 code.

5. How do you diagnose the P14B6 code?

Diagnosis typically involves using a scan tool to read live MAF sensor data, inspecting the sensor and its wiring for damage, checking the air intake system for obstructions, and testing the signal output of the MAF sensor.

6. How do I fix the P14B6 code on my 2014 GMC Sierra?

Repairs may include cleaning or replacing the MAF sensor, repairing or replacing damaged wiring or connectors, ensuring the air intake system is unobstructed, and updating the PCM software if needed.

7. Can I drive with the P14B6 code active?

While the vehicle may still be drivable, ignoring the code can lead to poor fuel efficiency, engine performance issues, and potential damage to other components. Itâ€™s best to address the issue promptly.

8. How much does it cost to fix the P14B6 code?

Repair costs vary but generally range from $100 to $400, depending on whether the MAF sensor needs cleaning or replacement and if additional repairs, like wiring fixes, are required.

9. Can a P14B6 code clear itself?

In rare cases, the code might clear itself if the issue was temporary, such as debris affecting the sensor. However, itâ€™s recommended to investigate and resolve the root cause to prevent recurrence.

10. Is P14B6 a common issue in the 2014 GMC Sierra?

While not extremely common, it can occur due to the MAF sensor being a critical component. Regular maintenance, such as cleaning the air intake system and replacing the air filter, can help prevent this issue.