Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the battery's ability to measure voltage. It's like when a toy's battery checker isn't working right, so it can't tell if the battery is full or empty.
The vehicle's control module has detected a low voltage condition in the battery voltage sense circuit, which is responsible for monitoring the voltage levels in the hybrid or electric vehicle's battery pack.
The P0B97 code indicates that the voltage sense circuit 'S' in the hybrid or electric vehicle's battery management system is reading lower than expected. This circuit is crucial for monitoring and managing the battery's state of charge and overall health. A low signal could mean a fault in the wiring, connectors, or the sensor itself.
• Check Engine Light is on
• Reduced fuel economy
• Possible reduction in vehicle performance
• Faulty battery voltage sensor
• Damaged or corroded wiring or connectors
• Faulty battery management system
OBD-II: On-Board Diagnostics, a system for self-diagnosing and reporting vehicle issues.
Battery Management System: A system that manages and monitors the battery's state of charge and health.
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the battery voltage sensor for proper operation.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the battery management system if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections.
• Ensure battery management software is up to date.
• Schedule regular maintenance checks.
Sensor Issue
• Do not ignore the Check Engine Light.
• Consult a professional mechanic for accurate diagnosis.
• Avoid driving long distances until the issue is resolved.
Check if the battery or electrical components are still under warranty, as hybrid/EV components often have extended coverage.
This code is relatively common in hybrid and electric vehicles as they age, particularly in models with high mileage or those exposed to harsh environmental conditions.
Moderate – While the vehicle may still be drivable, ignoring this issue can lead to reduced performance and potential battery damage.
Driving with a known issue in the battery management system can lead to further damage and may void warranties. Always address such issues promptly.
• Vehicle must be in a safe, stationary position.
• Ensure the battery is fully charged before testing.
The battery voltage sensor is typically located within or near the vehicle's battery pack, often in the rear of the vehicle.
Q: Can I drive my car with this code?
A: While you may be able to drive, it's not recommended as it can lead to further issues.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to reduced vehicle performance and potential damage to the battery system.
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