AutoCodes – Chevrolet – B144B 2018 Chevrolet Silverado

B144B 2018 Chevrolet Silverado Code - Run/Crank Power Relay Circuit

Quick Answer

The Body Control Module (BCM) controls the Ignition Main Relay (underhood) and the Ignition Main Relay (instrument panel left) through their control circuits by applying a voltage to the ignition run/crank relay coil control circuit. 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: B144B 2018 Chevrolet Silverado indicates Run/Crank 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 307

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 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B144B 2018 Chevrolet Silverado Description

The Body Control Module (BCM) controls the Ignition Main Relay (underhood) and the Ignition Main Relay (instrument panel left) through their control circuits by applying a voltage to the ignition run/crank relay coil control circuit. The Ignition Main Relay (underhood) and Ignition Main Relay (instrument panel left) are energized when the ignition switch is in the RUN or the CRANK position, or when a remote start is requested.
The Diagnostic Trouble Code (DTC) will be set when there is a fault in the Ignition Main Relay Circuit.

OBDII Code B144B 2018 Chevrolet Silverado - Run/Crank Power Relay Circuit - AutoCodes.com — B144B 2018 Chevrolet Silverado Code - Run/Crank Power Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B144B 2018 Chevrolet Silverado?

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 B144B 2018 Chevrolet Silverado?

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 B144B 2018 Chevrolet Silverado 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 B144B 2018 Chevrolet Silverado code?

Need more information on how to fix the B144B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B144B 2018 Chevrolet Silverado Code

1. What does OBDII code B144B on a 2018 Chevrolet Silverado indicate?

The B144B code indicates a problem with the Run/Crank Power Relay Circuit in the vehicle.

2. What are some common symptoms of a Run/Crank Power Relay Circuit issue in a 2018 Chevrolet Silverado?

Common symptoms include difficulty starting the vehicle, engine stalling, and intermittent power loss while driving.

3. What are possible causes of the B144B trouble code in a 2018 Chevrolet Silverado?

Possible causes include a faulty power relay, wiring issues, poor electrical connections, or a malfunctioning control module.

4. How can I diagnose a Run/Crank Power Relay Circuit problem in my 2018 Chevrolet Silverado?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble code, inspecting the relay and related wiring, and testing the power relay for proper functionality.

5. Can I still drive my 2018 Chevrolet Silverado with the B144B trouble code present?

It is not recommended to drive the vehicle with this code present, as it can lead to potential safety hazards and further damage to the vehicle.

6. How can I repair a B144B trouble code in my 2018 Chevrolet Silverado?

Repairing the issue may involve replacing the faulty power relay, repairing damaged wiring, ensuring proper electrical connections, or reprogramming the control module.

7. Is it possible to reset the B144B trouble code in a 2018 Chevrolet Silverado without making repairs?

Resetting the code without addressing the underlying issue may temporarily clear the code, but it is likely to return until the root cause is fixed.

8. Are there any preventive maintenance tips to avoid encountering the B144B trouble code in a 2018 Chevrolet Silverado?

Regularly inspecting the vehicle's electrical system, maintaining proper battery health, and addressing any warning signs promptly can help prevent issues leading to this trouble code.

9. Can a DIY enthusiast without advanced automotive knowledge address a B144B trouble code in a 2018 Chevrolet Silverado?

While some basic troubleshooting steps can be taken, diagnosing and repairing electrical issues like the Run/Crank Power Relay Circuit may require professional expertise and specialized tools.

10. How long does it typically take to repair a B144B trouble code in a 2018 Chevrolet Silverado?

The repair time can vary depending on the exact cause of the issue, but it may range from a quick relay replacement to more extensive troubleshooting and repair work taking several hours or more.