B0B08 - Battery Management System: High Voltage Battery System Performance (Common in 2017-2021 Chevrolet Bolt EV)

Quick Answer

B0B08 means: B0B08 indicates a performance issue with the high voltage battery management system.

Fix: Check and replace faulty components Cost: $1,500 - $3,500 Time: 90-180 minutes

Can I drive with B0B08? Immediate attention is recommended to avoid battery damage.

Common Questions

What does B0B08 mean and how does it affect my car?

The B0B08 code indicates a performance issue with your car's high voltage battery management system. This can lead to decreased driving range, reduced power output, and may even trigger warning lights on your dashboard. Ignoring this code can result in more significant battery issues, potentially leading to higher repair costs.

What are the most common causes of B0B08 and how much does it cost to fix?

Common causes of the B0B08 code include failing battery cells, faulty wiring, or software issues in the BMS. Repair costs can vary significantly, ranging from $200 for wiring repairs to $1,500 or more for battery cell replacements.

Can I drive my car with B0B08 or should I stop immediately?

While it may be possible to drive your car with the B0B08 code, it is advisable to avoid doing so if you notice any significant performance issues or warning lights. Continuing to drive could worsen the underlying problem and lead to costly repairs.

How can I diagnose B0B08 myself using GeekOBD APP?

To diagnose the B0B08 code using the GeekOBD APP, connect it to your vehicle's OBD2 port and scan for codes. Review the freeze frame data to understand when the issue occurred, and pay attention to any related codes that may give you more context.

What vehicles are most commonly affected by B0B08?

The B0B08 code is commonly found in electric vehicles like the 2017-2021 Chevrolet Bolt EV. Owners of these models should be aware of this code and monitor for symptoms that indicate battery management system issues.

How can I prevent B0B08 from happening again?

Preventive measures include regular maintenance of the battery system, ensuring connections are clean and tight, and updating software as recommended by the manufacturer. It's also crucial to avoid extreme driving conditions that can strain the battery.

What is B0B08?

The diagnostic trouble code (DTC) B0B08 signifies an issue with the battery management system (BMS), specifically relating to high voltage battery performance. This code is typically encountered in electric vehicles (EVs) like the Chevrolet Bolt EV and can indicate that the BMS has detected a fault that affects the battery's ability to operate efficiently. When B0B08 is triggered, it usually means there is a problem with the battery cells or the management system that oversees battery charging and discharging cycles. This can lead to reduced range, diminished performance, and in some cases, a complete loss of power. The BMS plays a crucial role in monitoring the health of the battery, ensuring it operates within safe parameters, and maximizing its lifespan. In practical terms, if you're experiencing this DTC, it could mean that your vehicle will not perform optimally, and you may notice symptoms such as decreased mileage per charge, warning lights on the dashboard, or even a sudden drop in available power while driving. It's essential to address this issue promptly to avoid further complications and potential damage to the vehicle's high-voltage battery system.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B0B08 is present:

  • The check engine light illuminates, indicating a problem with the battery management system.
  • Reduced driving range is observed, with noticeable drops in the distance you can travel per charge compared to normal performance.
  • The vehicle may exhibit sudden power loss during acceleration, leading to a less responsive driving experience.
  • Dashboard warnings specific to battery health or performance may appear, indicating potential issues.
  • In some cases, the vehicle may enter a 'limp mode' to preserve battery health, restricting power and performance.

Possible Causes

Most common causes of B0B08 (ordered by frequency):

  1. The most common cause (70%) is a failing battery cell or pack that cannot hold or deliver the required voltage efficiently.
  2. The second most common cause (20%) is related to faulty wiring or connections within the battery management system, leading to poor communication between the BMS and battery.
  3. A third possible cause (5%) could be software issues in the BMS that require a software update or reprogramming to function correctly.
  4. Less common but serious causes include physical damage to the high-voltage battery, which may require costly repairs or replacement.
  5. A rare cause might be an internal short circuit within the battery cells, which poses a safety risk and requires immediate professional intervention.

B0B08 Repair Costs

Cost Breakdown by Repair Type

Battery Cell Replacement

Replacing defective battery cells in the high-voltage battery pack.

  • Total: $1,500 - $3,500
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors within the battery management system.

  • Total: $200 - $500
  • Success rate: 90%
Software Update

Reprogramming the BMS with updated software to resolve any software-related issues.

  • Total: $100 - $200
  • Success rate: 95%
Money-Saving Tips for B0B08
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B0B08 Diagnosis Process

Follow these systematic steps to accurately diagnose B0B08. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform an initial visual inspection of the battery pack and connectors for any signs of damage or corrosion (5-10 minutes)

Step 1: Perform an initial visual inspection of the battery pack and connectors for any signs of damage or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to scan the vehicle's OBD2 system, retrieve all stored codes, and analyze freeze frame data for insights into the B0B08 code (10-15 minutes)

Step 2: Use the GeekOBD APP to scan the vehicle's OBD2 system, retrieve all stored codes, and analyze freeze frame data for insights into the B0B08 code (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Conduct component testing, including checking the voltage of individual battery cells and connections using a multimeter or specialized diagnostic tools (20-30 minutes)

Step 3: Conduct component testing, including checking the voltage of individual battery cells and connections using a multimeter or specialized diagnostic tools (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: After repairs, perform a system function test to ensure the BMS operates correctly and clear any trouble codes (10-15 minutes)

Step 4: After repairs, perform a system function test to ensure the BMS operates correctly and clear any trouble codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Complete a road test under various conditions to confirm that the vehicle's performance issues have been resolved (15-20 minutes)

Step 5: Complete a road test under various conditions to confirm that the vehicle's performance issues have been resolved (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Chevrolet Bolt EV Battery Cell Replacement

Vehicle: 2018 Chevrolet Bolt EV, 40,000 miles

Problem: Customer reported reduced range and check engine light.

Diagnosis: After scanning with GeekOBD APP, B0B08 was found along with other related codes indicating battery performance issues.

Solution: Replaced faulty battery cells and recalibrated the BMS.

Cost: $2,800 (including parts and labor)

Result: Post-repair, the vehicle regained full range and performance, with no further codes present.

Case Study 2: Wiring Repair on 2019 Chevrolet Bolt EV

Vehicle: 2019 Chevrolet Bolt EV, 30,000 miles

Problem: Customer experienced intermittent power loss and warning lights.

Diagnosis: Inspection revealed damaged wiring within the battery management system.

Solution: Repaired and reconnected damaged wiring, ensuring proper functionality.

Cost: $350 (labor and materials)

Result: Vehicle performance restored, no further occurrences of B0B08.

Diagnose B0B08

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B0B08
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes