Engine-CodesGMC – P0B73 GMC

P0B73 GMC Code - Hybrid/Electric Vehicle Battery 12 Circuit Performance

Quick Answer

The P0B73 GMC code specifically refers to an issue with the Hybrid/Electric Vehicle Battery 12 Circuit Performance. Common causes include Weak or failing 12-volt battery, Faulty wiring or connections in the battery circuit, Malfunctioning battery management system. 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
P0B73 GMC indicates Hybrid/Electric Vehicle Battery 12 Circuit Performance.
Common causes
Common causes include Weak or failing 12-volt battery, Faulty wiring or connections in the battery circuit, Malfunctioning battery management system.
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 11, 2024
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Code P0B73 GMC Description

The P0B73 GMC code specifically refers to an issue with the Hybrid/Electric Vehicle Battery 12 Circuit Performance. In hybrid and electric vehicles, the 12-volt battery is a crucial component that works in conjunction with the high-voltage battery to power various systems in the vehicle. The 12-volt battery is responsible for providing power to the vehicle's accessories, lights, and starting the engine in hybrid vehicles.

OBDII Code P0B73 GMC - Hybrid/Electric Vehicle Battery 12 Circuit Performance
P0B73 GMC Code - Hybrid/Electric Vehicle Battery 12 Circuit Performance

Common Causes of P0B73 GMC

  1. Weak or failing 12-volt battery
  2. Faulty wiring or connections in the battery circuit
  3. Malfunctioning battery management system
  4. Issues with the charging system
  5. High electrical loads on the battery

Symptoms of P0B73 GMC

  1. Difficulty starting the vehicle
  2. Dim or flickering lights
  3. Unresponsive accessories (radio, power windows, etc.)
  4. Warning lights on the dashboard related to the hybrid/electric system
  5. Reduced fuel efficiency in hybrid vehicles

How to Fix P0B73 GMC

  1. Begin by checking the 12-volt battery to ensure it is functioning properly. If the battery is weak or failing, replace it with a new one.
  2. Inspect the wiring and connections in the battery circuit for any damage or corrosion. Repair or replace any faulty components.
  3. Test the battery management system to ensure it is functioning correctly. Replace any malfunctioning components as needed.
  4. Check the charging system, including the alternator and voltage regulator, to ensure they are charging the battery properly.
  5. Clear the DTC and reset the vehicle's computer system to see if the issue has been resolved.

Cost to Fix P0B73 GMC

The cost of repairing a Hybrid/Electric Vehicle Battery 12 Circuit Performance issue can vary depending on the specific cause of the problem. In general, replacing a 12-volt battery can cost between $100 and $300, including parts and labor. However, if the issue is more complex and requires repairs to the wiring, battery management system, or charging system, the cost could be higher. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more precise estimate.

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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 P0B73 GMC Code

What does the OBDII code P0B73 mean for my GMC vehicle?

The OBDII code P0B73 indicates a performance issue with the 12-volt circuit of the hybrid or electric vehicle battery system.

What are common symptoms of the P0B73 code?

Common symptoms include warning lights on the dashboard, reduced power or performance, and the vehicle may enter a limp mode.

What could cause the P0B73 code to trigger?

Potential causes include a faulty battery management system, damaged wiring or connections, or issues with the hybrid battery itself.

How can I diagnose the P0B73 code?

Start by using an OBD-II scanner to confirm the code, then inspect the battery connections, wiring, and battery management system for any damage or faults.

Is it safe to drive my GMC with the P0B73 code?

It's not recommended to drive the vehicle with this code, as it may lead to reduced performance and could further damage the battery system.

What are some potential repairs for the P0B73 code?

Repairs may include replacing damaged wiring, repairing or replacing the battery management system, or replacing the hybrid battery if necessary.

Can I reset the P0B73 code after making repairs?

Yes, once repairs are made, you can reset the code using an OBD-II scanner. However, ensure the underlying issue is resolved to prevent the code from returning.

Will the P0B73 code affect my vehicle's fuel economy?

Yes, if the hybrid or electric battery system is not functioning properly, it can lead to decreased fuel efficiency and overall vehicle performance.

How much might it cost to fix the P0B73 code?

Repair costs can vary widely depending on the issue, ranging from a few hundred dollars for minor repairs to several thousand for battery replacement.

Discuss the causes and fixes for P0B73 GMC OBDII Code

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