AutoCodes – GMC – B1428 GMC

B1428 GMC Code - Ignition Switched Power Run/Crank Relay Circuit

Quick Answer

The Body Control Module (BCM) controls the Run/Crank relay through the run/crank relay coil control circuit by applying voltage to the circuit. Common causes include Faulty Ignition Switched Power Run/Crank Relay, Ignition Switched Power Run/Crank Relay harness is open or shorted, Ignition Switched Power Run/Crank 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: B1428 GMC indicates Ignition Switched Power Run/Crank Relay Circuit.
Common causes: Common causes include Faulty Ignition Switched Power Run/Crank Relay, Ignition Switched Power Run/Crank Relay harness is open or shorted, Ignition Switched Power Run/Crank 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.

Save to My Repairs My Repairs

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

Code Popularity 1,853

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 09, 2019

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 B1428 GMC Description

The Body Control Module (BCM) controls the Run/Crank relay through the run/crank relay coil control circuit by applying voltage to the circuit. The Run/Crank relay is energized when the ignition switch is in ON or START, or when a remote start is requested. The OBDII codes set when the BCM detects a short to ground in the run/crank relay coil control circuit.

OBDII Code B1428 GMC - Ignition Switched Power Run/Crank Relay Circuit - AutoCodes.com — B1428 GMC Code - Ignition Switched Power Run/Crank Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B1428 GMC?

Faulty Ignition Switched Power Run/Crank Relay
Ignition Switched Power Run/Crank Relay harness is open or shorted
Ignition Switched Power Run/Crank Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1428 GMC?

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 B1428 GMC 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 B1428 GMC code?

Need more information on how to fix the B1428 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1428 GMC 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 B1428 GMC Code

1. What are the common symptoms of OBDII code B1428 GMC?

- Common symptoms include issues with the ignition switch, difficulty starting the vehicle, and a possible illuminated Check Engine Light.

2. What causes the OBDII code B1428 GMC to trigger?

- This code is typically triggered by a malfunction in the ignition switched power run/crank relay circuit, often due to a faulty relay or wiring issue.

3. How can I diagnose the underlying issue causing code B1428 GMC?

- To diagnose the problem, you may need to perform a thorough inspection of the ignition switch, relay, and associated wiring to check for any damage or loose connections.

4. Is it safe to continue driving with OBDII code B1428 GMC present?

- It is not recommended to drive with this code present, as it could lead to unexpected stalling or starting issues, potentially leaving you stranded.

5. Can I repair the ignition switched power run/crank relay circuit issue myself?

- While some DIY enthusiasts may attempt to address the issue by replacing the faulty relay or fixing wiring problems, it is advisable to seek professional help for an accurate diagnosis and repair.

6. Are there any quick fixes or temporary solutions for OBDII code B1428 GMC?

- Quick fixes like resetting the error code may temporarily clear the Check Engine Light, but the underlying issue causing the code will still need to be addressed for a permanent solution.

7. How much does it typically cost to repair OBDII code B1428 GMC?

- Repair costs can vary depending on the extent of the issue and whether you choose to address it yourself or take your vehicle to a mechanic. Costs may range from a few dollars for a DIY fix to a few hundred dollars for professional repairs.

8. Can a faulty ignition switch cause code B1428 GMC to appear?

- Yes, a faulty ignition switch can contribute to the triggering of this code, as it affects the proper functioning of the ignition switched power run/crank relay circuit.

9. What are the potential risks of ignoring OBDII code B1428 GMC?

- Ignoring this code can lead to further electrical problems in your vehicle, potential starting issues, and even safety hazards if the vehicle stalls unexpectedly while driving.

10. How long does it take to repair the ignition switched power run/crank relay circuit issue?

- The repair time can vary depending on the exact cause of the problem and the expertise of the mechanic. In general, it may take anywhere from 1-3 hours to diagnose and repair the issue.