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 a sensor that checks the voltage of the hybrid or electric vehicle's battery. It's like a thermometer for the battery, and it's saying the temperature is too high.
The P0B57 code is triggered when the battery management system detects a higher than expected voltage reading from the battery voltage sense circuit 'F'.
The hybrid or electric vehicle's battery management system uses various sensors to monitor the voltage of the battery pack. The 'F' circuit refers to a specific sensor or part of the system responsible for sensing voltage. If the voltage reading is higher than the expected range, the system triggers this code, indicating a potential issue with the sensor, wiring, or battery itself.
• Illuminated check engine light
• Reduced fuel efficiency
• Possible reduced power or performance
• Faulty battery voltage sensor
• Wiring issues or poor connections in the voltage sense circuit
• Defective battery management system module
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.
Battery Management System: A system that manages a rechargeable battery by monitoring its state, calculating secondary data, reporting that data, and controlling its environment.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connections of the battery voltage sense circuit.
• Test the battery voltage sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty battery voltage sensor.
• Reprogram or replace the battery management system module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks of the hybrid/EV battery system
• Ensure all software updates are applied
• Inspect wiring and connectors periodically
Sensor Issue
• Avoid driving long distances until the issue is resolved.
• Consult with a certified hybrid/EV technician.
Check with the vehicle manufacturer for warranty coverage on hybrid/EV battery components.
This code has become more common with the increased use of hybrid and electric vehicles, highlighting the importance of battery management systems.
Moderate – It's important to address this issue to prevent potential battery damage or reduced vehicle performance.
Driving with a malfunctioning battery sensor can lead to reduced performance or battery damage, which may pose safety risks.
• Vehicle in 'Ready' mode
• Battery at normal operating temperature
The battery voltage sensor is typically located within or near the battery pack of the hybrid or electric vehicle.
Q: Can I drive my car with a P0B57 code?
A: It's possible to drive short distances, but it is recommended to have the issue checked as soon as possible to avoid potential battery damage.
Q: Will this code affect my car's performance?
A: Yes, it can lead to reduced fuel efficiency and performance if not addressed.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.