AutoCodes – GMC – B151A GMC

B151A GMC Code - Low Battery Capacity Detected

Quick Answer

The Body Control Module (BCM) monitors the battery voltage level during an engine crank event to detect a low battery voltage condition. Common causes include Low Vehicle Battery, Charging System, Faulty Body Control Module (BCM). 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: B151A GMC indicates Low Battery Capacity Detected.
Common causes: Common causes include Low Vehicle Battery, Charging System, Faulty Body Control Module (BCM).
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 911

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 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B151A GMC Description

The Body Control Module (BCM) monitors the battery voltage level during an engine crank event to detect a low battery voltage condition. The Diagnostic Trouble Code (DTC) sets when a minimum crank battery voltage is less than the minimum crank battery voltage threshold for 16 consecutive crank events.

OBDII Code B151A GMC - Low Battery Capacity Detected - AutoCodes.com — B151A GMC Code - Low Battery Capacity Detected

What does this mean?

What are the Possible Causes of the DTC B151A GMC?

Low Vehicle Battery
Charging System
Faulty Body Control Module (BCM)

How to Fix the DTC B151A 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 B151A 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 B151A GMC code?

Need more information on how to fix the B151A GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B151A GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B151A 2014 GMC Sierra — Low Battery Capacity Detected
B151A 2015 GMC Sierra — Low Battery Capacity Detected
B151A 2016 GMC Sierra — Low Battery Capacity Detected
B151A 2017 GMC Sierra — Low Battery Capacity Detected
B151A 2018 GMC Sierra — Low Battery Capacity Detected

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 B151A GMC Code

1. What are the common symptoms of OBDII code B151A GMC (Low Battery Capacity Detected)?

- Common symptoms include difficulty starting the vehicle, dimming headlights, erratic electrical issues, and potential warning lights on the dashboard.

2. What can cause the OBDII code B151A GMC to trigger?

- The code may trigger due to a weak or failing vehicle battery, faulty alternator, poor electrical connections, or excessive power draw from accessories.

3. How can I diagnose the cause of the OBDII code B151A GMC?

- You can diagnose the issue by testing the vehicle's battery voltage, checking the alternator output, inspecting battery terminals for corrosion, and scanning for other related trouble codes.

4. What are the potential dangers of ignoring the OBDII code B151A GMC?

- Ignoring the code can lead to unexpected stalling, complete battery failure, and potential damage to the vehicle's electrical system, leaving you stranded on the road.

5. Can I drive my vehicle with the OBDII code B151A GMC active?

- It is not recommended to drive the vehicle with the code active, as it indicates a potential issue with the battery or charging system that can result in a breakdown.

6. How can I reset the OBDII code B151A GMC after addressing the underlying issue?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code from the system.

7. What are some DIY repair tips for resolving the OBDII code B151A GMC?

- DIY repair tips include checking and cleaning battery terminals, inspecting the alternator belt for wear, ensuring proper battery fluid levels, and avoiding overloading the electrical system.

8. How much does it typically cost to repair the OBDII code B151A GMC at a professional auto repair shop?

- The cost of repair can vary depending on the underlying issue, but it may range from $100-$500, including parts and labor for battery replacement, alternator repair, or electrical system diagnosis.

9. Is it possible for a faulty sensor to trigger the OBDII code B151A GMC?

- While less common, a faulty battery sensor or charging system sensor can potentially trigger the code, so it's recommended to perform a thorough diagnosis to pinpoint the exact cause.

10. How can I prevent the OBDII code B151A GMC from recurring in the future?

- To prevent the code from recurring, regularly inspect and maintain your vehicle's battery, alternator, and electrical system, avoid overloading the electrical system, and address any warning signs promptly.