AutoCodes – Buick – B144B Buick

B144B Buick 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 Buick 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 988

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 Buick 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 Buick - Run/Crank Power Relay Circuit - AutoCodes.com — B144B Buick Code - Run/Crank Power Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B144B Buick?

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 Buick?

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 Buick 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 B144B Buick Code

1. What does the OBDII code B144B for Buick Run/Crank Power Relay Circuit indicate?

- This code indicates a problem with the power relay circuit responsible for starting the vehicle.

2. What are the common symptoms of a B144B Buick code?

- Common symptoms include difficulty starting the vehicle, intermittent starting issues, and potential stalling while driving.

3. What are possible causes of the B144B code in a Buick?

- Possible causes include a faulty power relay, damaged wiring or connectors in the circuit, or issues with the ignition switch.

4. How can I diagnose the B144B Buick code?

- Diagnosing this code typically involves checking the power relay, inspecting the wiring and connectors, and testing the ignition switch for proper functionality.

5. Can I still drive my Buick with a B144B trouble code?

- It is not recommended to drive the vehicle with this code, as it can lead to potential starting and stalling issues that may leave you stranded.

6. How can I repair the B144B code in my Buick?

- Repairing this code usually involves replacing the faulty power relay, repairing any damaged wiring or connectors, and ensuring the ignition switch is functioning correctly.

7. Is it necessary to reset the trouble codes after repairing a B144B code?

- Yes, it is important to clear the trouble codes using an OBDII scanner after making any repairs to ensure the issue has been resolved.

8. Can a DIY enthusiast fix the B144B code in a Buick?

- Depending on your experience and tools, you may be able to diagnose and repair this code yourself, but it is recommended to seek professional help if you are unsure.

9. Are there any preventive measures to avoid the B144B code in the future?

- Regular maintenance, such as checking the electrical system and components, can help prevent issues like the B144B code from occurring.

10. How serious is the B144B code in a Buick?

- While not a severe issue on its own, the B144B code can lead to starting and stalling problems, so it should be addressed promptly to avoid potential safety risks.