Engine-CodesGMC – P0B77 GMC

P0B77 GMC Code - Hybrid/Electric Vehicle Battery 13 Circuit

Quick Answer

The P0B77 code for GMC vehicles specifically refers to an issue with the Hybrid/Electric Vehicle Battery 13 Circuit. Common causes include Faulty wiring or connections in the battery circuit, Corrosion or damage to the battery terminals, Battery pack issues or faults. 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
P0B77 GMC indicates Hybrid/Electric Vehicle Battery 13 Circuit.
Common causes
Common causes include Faulty wiring or connections in the battery circuit, Corrosion or damage to the battery terminals, Battery pack issues or faults.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0B77 GMC Description

The P0B77 code for GMC vehicles specifically refers to an issue with the Hybrid/Electric Vehicle Battery 13 Circuit. This code indicates a problem with the circuit related to the battery in hybrid or electric vehicles. The battery is a crucial component in these types of vehicles as it stores and provides power to the electric motor, allowing the vehicle to operate on electric power alone or in combination with a gasoline engine in hybrid models.

OBDII Code P0B77 GMC - Hybrid/Electric Vehicle Battery 13 Circuit
P0B77 GMC Code - Hybrid/Electric Vehicle Battery 13 Circuit

Common Causes of P0B77 GMC

  1. Faulty wiring or connections in the battery circuit
  2. Corrosion or damage to the battery terminals
  3. Battery pack issues or faults
  4. Software or control module issues
  5. Overcharging or over-discharging of the battery

Symptoms of P0B77 GMC

  1. Reduced fuel efficiency
  2. Loss of power
  3. Warning light on the dashboard
  4. Vehicle may not start
  5. Inability to operate in electric mode

How to Fix P0B77 GMC

  1. Begin by conducting a thorough inspection of the battery circuit, checking for any visible damage, corrosion, or loose connections.
  2. Test the battery pack and individual cells to ensure they are functioning correctly.
  3. Check and update the software or control modules that manage the battery system.
  4. Repair or replace any faulty wiring, connectors, or components in the battery circuit.
  5. Reset the fault code and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0B77 GMC

The cost of repairing a Hybrid/Electric Vehicle Battery 13 Circuit issue can vary depending on the extent of the problem and the specific repairs needed. In general, the cost of parts and labor for this type of repair can range from $500 to $1500. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices for the same repair.

Need more information about the P0B77 GMC code?

Need more information on how to fix the P0B77 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B77 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 P0B77 GMC Code

1. What does the OBDII code P0B77 for GMC Hybrid/Electric Vehicle Battery 13 Circuit indicate?

The code P0B77 indicates an issue with the Hybrid/Electric Vehicle Battery 13 Circuit in your GMC vehicle.

2. What are common symptoms of the P0B77 code in a GMC vehicle?

Common symptoms of the P0B77 code may include the Hybrid/Electric Vehicle Battery warning light illuminating on the dashboard, decreased fuel efficiency, and potential issues with hybrid/electric system performance.

3. What are possible causes of the P0B77 code in a GMC vehicle?

Possible causes of the P0B77 code include a faulty hybrid/electric battery, damaged wiring or connectors in the Hybrid/Electric Vehicle Battery 13 Circuit, or issues with the battery management system.

4. How can I diagnose the P0B77 code in my GMC vehicle?

Diagnosing the P0B77 code typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the hybrid/electric battery and related components for damage, and testing the wiring and connectors for continuity.

5. Is it safe to continue driving with the P0B77 code present in my GMC vehicle?

It is not recommended to continue driving with the P0B77 code present, as it can lead to potential issues with the hybrid/electric system and may cause further damage to the vehicle.

6. How can I repair the P0B77 code in my GMC vehicle?

Repairing the P0B77 code may involve replacing the hybrid/electric battery, repairing or replacing damaged wiring and connectors, or resetting the battery management system with the help of a qualified technician.

7. Can I reset the P0B77 code in my GMC vehicle myself?

While you may be able to clear the code temporarily using a diagnostic scanner, it is important to address the underlying issue causing the P0B77 code to prevent it from reoccurring.

8. Are there any maintenance tips to prevent the P0B77 code from appearing in my GMC vehicle?

Regularly inspecting the hybrid/electric battery, keeping the battery terminals clean and secure, and following the manufacturer's maintenance schedule can help prevent issues that may trigger the P0B77 code.

9. How much does it typically cost to repair the P0B77 code in a GMC vehicle?

The cost of repairing the P0B77 code can vary depending on the specific cause of the issue, the extent of the damage, and the labor rates in your area. It is recommended to get a professional diagnosis for an accurate estimate.

10. Can the P0B77 code be related to other OBDII codes in a GMC vehicle?

The P0B77 code is specific to the Hybrid/Electric Vehicle Battery 13 Circuit and may not be directly related to other OBDII codes. It is important to address each code individually to ensure all issues are properly resolved.

Discuss the causes and fixes for P0B77 GMC OBDII Code

Code P0B77 GMC comments

No comments found for this page.