AutoCodes – GMC – B144A 2014 GMC Sierra

B144A 2014 GMC Sierra Code - Run Power Relay Circuit

Quick Answer

The Body Control Module (BCM) feeds the ignition circuit by applying voltage when the ignition is in the ON position. Common causes include Faulty Ignition Main Relay, Ignition Main Relay harness is open or shorted, Ignition Main Relay 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: B144A 2014 GMC Sierra indicates Run Power Relay Circuit.
Common causes: Common causes include Faulty Ignition Main Relay, Ignition Main Relay harness is open or shorted, Ignition Main Relay 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 177

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 Apr 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B144A 2014 GMC Sierra Description

The Body Control Module (BCM) feeds the ignition circuit by applying voltage when the ignition is in the ON position. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a fault in the ignition run relay coil control circuit.

OBDII Code B144A 2014 GMC Sierra - Run Power Relay Circuit - AutoCodes.com — B144A 2014 GMC Sierra Code - Run Power Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B144A 2014 GMC Sierra?

Faulty Ignition Main Relay
Ignition Main Relay harness is open or shorted
Ignition Main Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B144A 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 B144A 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 B144A 2014 GMC Sierra code?

Need more information on how to fix the B144A 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B144A 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B144A 2014 GMC Sierra Code

1. What does the OBDII code B144A mean on a 2014 GMC Sierra?

B144A refers to an issue in the Run Power Relay Circuit, indicating a fault in how the vehicle controls power to certain systems when in the "Run" mode.

2. What are the common symptoms of code B144A in a 2014 GMC Sierra?

Symptoms may include the vehicle not starting, accessories not functioning in "Run" mode, or intermittent electrical issues.

3. What causes the B144A code in a 2014 GMC Sierra?

Common causes include a faulty run power relay, wiring issues like corrosion or damage, a blown fuse, or a problem with the Body Control Module (BCM).

4. How do I diagnose the B144A code on my GMC Sierra?

Start by checking the run power relay, inspecting related wiring and connectors for damage, and testing the fuses. If no issues are found, scan the BCM for additional faults.

5. Can a bad relay cause the B144A code in my GMC Sierra?

Yes, a defective run power relay can fail to provide proper power to circuits, triggering the B144A code.

6. Is it safe to drive with the B144A code on a 2014 GMC Sierra?

Driving may be unsafe if the issue affects critical electrical systems or the vehicle's ability to stay running. It's best to address the code promptly.

7. How do I fix the B144A code on my GMC Sierra?

Fixes may include replacing the faulty run power relay, repairing damaged wiring, replacing blown fuses, or reprogramming or replacing the BCM if necessary.

8. How much does it cost to repair a B144A code on a 2014 GMC Sierra?

The cost depends on the root cause. Replacing a run power relay or fuse is relatively inexpensive, while BCM repair or replacement can be more costly, ranging from $300 to $1,000.

9. Can a battery issue trigger the B144A code in my GMC Sierra?

Yes, a weak or failing battery can cause electrical irregularities that might trigger this code. Ensure the battery and charging system are functioning properly.

10. Do I need a professional to fix the B144A code on my 2014 GMC Sierra?

If youâ€™re familiar with electrical diagnostics, you can attempt basic troubleshooting. However, for BCM issues or advanced diagnostics, professional assistance is recommended.