C0899 Trouble Code: Causes, Symptoms, and Solutions

C0899 Trouble Code: Causes, Symptoms, and Solutions

If you’re a vehicle owner or car enthusiast, you’ve likely encountered various diagnostic trouble codes (DTCs) that can pop up when something goes awry in your vehicle. One such code is the C0899. This code is typically associated with low battery voltage, specifically within the Electronic Brake Control Module (EBCM). Understanding what this code means, its implications, and how to address it can help maintain your vehicle’s performance and ensure it remains compliant with emission standards.

What is the C0899 Code?

The C0899 trouble code indicates that the voltage supplied to the EBCM is below the required threshold. This can be due to several reasons, including a faulty battery, issues with the charging system, or problems with the voltage regulator. The EBCM is crucial for the proper functioning of the Anti-lock Braking System (ABS), and any voltage irregularities can lead to performance issues.

Top 20 Vehicles Commonly Affected by the C0899 Code

Based on various sources and user reports, the following vehicles are commonly affected by the C0899 code:

  • Chevrolet Malibu
  • Chevrolet Colorado
  • Chevrolet Equinox
  • Chevrolet Express
  • Chevrolet Silverado
  • GMC Sierra
  • GMC Savana
  • GMC Canyon
  • Cadillac Escalade
  • Buick Enclave
  • Buick LaCrosse
  • Pontiac G6
  • Saturn Vue
  • Saturn Aura
  • Hummer H3
  • Chevrolet Tahoe
  • GMC Yukon
  • Chevrolet Suburban
  • Chevrolet Traverse
  • GMC Acadia

Implications on Vehicle Performance and Emissions

When the C0899 code is triggered, it can have several implications:

  • Reduced ABS Functionality: The ABS may not function correctly, leading to potential safety issues during braking.
  • Increased Emissions: A malfunctioning EBCM can indirectly affect the vehicle’s overall performance, potentially leading to higher emissions.
  • Battery and Charging System Strain: Persistent low voltage can strain the battery and the charging system, leading to further electrical issues.

Diagnosing and Fixing the C0899 Code

Key Symptoms

  • ABS warning light illuminated on the dashboard
  • Intermittent or complete loss of ABS functionality
  • Other electrical issues, such as dimming lights or slow power windows

Diagnostic Steps

  1. Check Battery Voltage: Use a multimeter to check the battery voltage. It should be around 12.6 volts when the engine is off and between 13.7 to 14.7 volts when the engine is running.
  2. Inspect Charging System: Ensure the alternator is functioning correctly and providing adequate charge to the battery.
  3. Examine Voltage Regulator: Check the voltage regulator for any faults. It ensures the correct voltage is supplied to various vehicle components.
  4. Inspect Wiring and Connections: Look for any loose or corroded connections in the EBCM circuit.


  • Replace Faulty Battery: If the battery voltage is consistently low, consider replacing the battery.
  • Repair or Replace Alternator: If the alternator is not charging the battery correctly, it may need repair or replacement.
  • Fix Voltage Regulator Issues: Replace the voltage regulator if it is not maintaining the correct voltage.
  • Secure Connections: Ensure all connections are tight and free of corrosion.


1. Is it safe to drive with the C0899 code?

Driving with the C0899 code is not recommended as it can impair the ABS functionality, increasing the risk of accidents during emergency braking.

2. What are the potential repair costs?

Repair costs can vary:

  • Battery replacement: $100 – $200
  • Alternator repair/replacement: $300 – $600
  • Voltage regulator replacement: $50 – $200

3. How can I prevent the C0899 code?

  • Regularly check and maintain your battery and charging system.
  • Ensure all electrical connections are secure and free from corrosion.
  • Perform routine vehicle inspections to catch potential issues early.


Addressing the C0899 trouble code promptly is crucial for maintaining your vehicle’s performance and ensuring compliance with emission standards. By understanding the symptoms, diagnosing the issue correctly, and taking appropriate action, you can keep your vehicle running smoothly and safely. Regular maintenance and inspections can help prevent such issues from arising, ensuring your vehicle remains in top condition.

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