AutoCodes – GMC – B144A 2017 GMC Sierra

B144A 2017 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 2017 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 170

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 2017 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 2017 GMC Sierra - Run Power Relay Circuit - AutoCodes.com — B144A 2017 GMC Sierra Code - Run Power Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B144A 2017 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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B144A 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.

Need more information about the B144A 2017 GMC Sierra code?

Need more information on how to fix the B144A 2017 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 B144A 2017 GMC Sierra Code

1. What does OBDII code B144A mean on a 2017 GMC Sierra?

Code B144A refers to an issue with the Run Power Relay Circuit, indicating a fault in the circuit responsible for powering certain vehicle systems when the ignition is in the "Run" position.

2. What are common symptoms of code B144A in a 2017 GMC Sierra?

Symptoms may include intermittent or no power to accessories, failure of certain electrical systems to operate, or issues starting the vehicle.

3. What causes the B144A code to appear on a 2017 GMC Sierra?

This code can be caused by a faulty run power relay, damaged wiring or connectors in the relay circuit, or an issue with the Body Control Module (BCM).

4. Can a blown fuse trigger code B144A on a 2017 GMC Sierra?

Yes, a blown fuse in the run power relay circuit can cause this code to be set, as it disrupts the electrical connection.

5. How do you diagnose code B144A on a 2017 GMC Sierra?

Diagnosis typically involves checking the run power relay for proper operation, inspecting wiring and connectors for damage, and testing the BCM for faults.

6. Can a faulty run power relay cause the truck not to start?

Yes, if the relay fails completely, it could prevent the vehicle from starting or result in a loss of power to critical systems.

7. How do you fix code B144A on a 2017 GMC Sierra?

Repairs may include replacing a faulty run power relay, repairing or replacing damaged wiring, and in rare cases, reprogramming or replacing the BCM.

8. Is the B144A code on a 2017 GMC Sierra a serious issue?

While not typically an immediate safety concern, it can lead to power loss in important systems, so it should be addressed promptly to avoid further complications.

9. Can you clear the B144A code without fixing the problem?

Clearing the code without fixing the underlying issue will likely result in the code reappearing and the symptoms persisting.

10. How much does it typically cost to repair code B144A on a 2017 GMC Sierra?

Repair costs vary depending on the root cause, but replacing a run power relay typically costs $50-$150, while wiring or BCM repairs may be more expensive.