AutoCodes – GMC – B1424 2018 GMC Sierra

B1424 2018 GMC Sierra Code - Control Module Power Circuit

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Low battery voltage, Faulty Control Module, Control Module harness is open or shorted. 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: B1424 2018 GMC Sierra indicates Control Module Power Circuit.
Common causes: Common causes include Low battery voltage, Faulty Control Module, Control Module harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 256

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 Jul 11, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1424 2018 GMC Sierra Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Damage to components, and incorrect data can occur when the voltage is out of range. The vehicle has multiple Control Modules that will set this Diagnostic Trouble Code (DTC).

OBDII Code B1424 2018 GMC Sierra - Control Module Power Circuit - AutoCodes.com — B1424 2018 GMC Sierra Code - Control Module Power Circuit

What does this mean?

What are the Possible Causes of the DTC B1424 2018 GMC Sierra?

Low battery voltage
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC B1424 2018 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 B1424 2018 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 B1424 2018 GMC Sierra code?

Need more information on how to fix the B1424 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1424 2018 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 B1424 2018 GMC Sierra Code

1. What does the OBDII code B1424 mean on a 2018 GMC Sierra?

The code B1424 indicates an issue with the Control Module Power Circuit, typically related to communication or power supply problems.

2. What are common symptoms of a B1424 code in a 2018 GMC Sierra?

Symptoms may include non-functional HVAC controls, inconsistent system operation, or warning lights on the dashboard.

3. What causes the B1424 code to trigger in a GMC Sierra?

Common causes include a blown fuse, damaged wiring, poor ground connections, or a faulty control module.

4. How do I diagnose the B1424 code on my 2018 GMC Sierra?

Start by checking the fuses, inspecting the wiring and connectors for damage, and verifying power and ground at the control module.

5. Can a weak battery cause the B1424 code on a GMC Sierra?

Yes, a weak or failing battery can cause voltage drops that may trigger the code.

6. What tools are needed to troubleshoot the B1424 code?

Youâ€™ll need an OBDII scanner, a multimeter to check voltage and continuity, and a wiring diagram for the vehicle.

7. Is it safe to drive a 2018 GMC Sierra with the B1424 code?

While it may not cause immediate safety concerns, the issue can affect system functionality and should be addressed promptly.

8. How do I fix the B1424 code on my 2018 GMC Sierra?

Repairs may include replacing blown fuses, repairing damaged wiring, cleaning corroded connectors, or replacing the faulty control module.

9. Can the B1424 code clear itself after fixing the issue?

In some cases, the code may clear after a proper repair, but itâ€™s often necessary to reset it using an OBDII scanner.

10. How much does it cost to repair a B1424 code on a GMC Sierra?

Costs vary depending on the root cause; simple fixes like replacing a fuse may cost a few dollars, while control module replacement can cost several hundred dollars.