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Engine-Codes – Generic – P1B79

P1B79 Code - Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage

Quick Answer

The diagnostic trouble code P1B79 indicates a problem with the Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage. Common causes include Damaged battery cells, Faulty wiring or connectors in the 50 circuit, Corrosion on battery terminals or connectors. 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
P1B79 indicates Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage.
Common causes
Common causes include Damaged battery cells, Faulty wiring or connectors in the 50 circuit, Corrosion on battery terminals or connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1B79 Description

The diagnostic trouble code P1B79 indicates a problem with the Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage. In hybrid and electric vehicles, the high-voltage battery is a critical component that powers the electric motor. The battery voltage needs to be within a specific range for the vehicle to operate efficiently. When the voltage in the battery's 50 circuit drops below the expected level, it can lead to various performance issues and potentially cause long-term damage if not addressed promptly.

OBDII Code P1B79 - Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
P1B79 Code - Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage

Common Causes of P1B79

  1. Damaged battery cells
  2. Faulty wiring or connectors in the 50 circuit
  3. Corrosion on battery terminals or connectors
  4. Malfunctioning battery management system
  5. Overcharging or discharging of the battery

Symptoms of P1B79

  1. Warning light on the dashboard indicating a battery system fault
  2. Reduced power output or acceleration
  3. Decreased fuel efficiency
  4. Vehicle may not start or move

How to Fix P1B79

  1. Perform a diagnostic scan to retrieve the trouble code and identify the specific issue with the battery 50 circuit.
  2. Inspect the high-voltage battery for any visible damage, such as leaking or bulging cells.
  3. Check the wiring and connectors in the 50 circuit for any signs of damage or corrosion, and repair or replace as needed.
  4. Test the battery management system to ensure it is functioning correctly and recalibrate if necessary.
  5. Clear the trouble code from the vehicle's system and test drive to confirm that the issue has been resolved.

Cost to Fix P1B79

The cost of repairing a Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage issue can vary significantly depending on the extent of the damage and the specific repairs needed. In general, the cost of replacing damaged battery cells or wiring can range from $500 to $1500, including parts and labor. However, additional diagnostic fees and labor costs may apply, so it's advisable to consult a professional technician for a more accurate estimate based on your vehicle's make and model, as well as the severity of the issue. Remember that labor rates can vary based on location, so it's essential to inquire about local rates before proceeding with the repair.

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Code P1B79 Information for Specific Makes

  • P1B79 Buick — Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
  • P1B79 Cadillac — Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
  • P1B79 Chevrolet — Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
  • P1B79 GMC — Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
  • P1B79 Saturn — Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage
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 P1B79 Code

1. What are common symptoms of OBDII code P1B79 (Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage)?

- Common symptoms include reduced power, poor fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B79?

- The code P1B79 can be triggered by a faulty hybrid/electric vehicle battery, issues with the battery management system, or a problem with the battery control module.

3. How can I diagnose the OBDII code P1B79?

- Diagnosing the code P1B79 typically involves using a scan tool to access the vehicle's onboard diagnostic system and check for any related fault codes.

4. What are some repair tips for addressing OBDII code P1B79?

- Repair tips may include inspecting the hybrid/electric vehicle battery for damage, checking the battery connections, and ensuring proper functioning of the battery control module.

5. Can I still drive my vehicle with OBDII code P1B79 present?

- It is not recommended to drive the vehicle with OBDII code P1B79 present, as it can lead to further damage to the hybrid/electric vehicle system.

6. How serious is OBDII code P1B79 (Hybrid/Electric Vehicle Battery 50 Circuit Low Voltage)?

- OBDII code P1B79 should be taken seriously as it indicates a potential issue with the hybrid/electric vehicle battery, which can affect the vehicle's performance and reliability.

7. What should I do if I encounter OBDII code P1B79 while driving?

- If you encounter OBDII code P1B79 while driving, it is recommended to pull over safely, turn off the vehicle, and have the issue diagnosed and repaired by a qualified technician.

8. Can I reset OBDII code P1B79 on my own?

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

9. How much does it typically cost to repair OBDII code P1B79?

- The cost of repair for OBDII code P1B79 can vary depending on the extent of the issue and the specific components that need to be repaired or replaced.

10. Is OBDII code P1B79 covered by warranty for hybrid/electric vehicles?

- In many cases, OBDII code P1B79 may be covered under the warranty for hybrid/electric vehicle components. It is recommended to check with the vehicle manufacturer or dealership for more information.

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