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 thinks the battery is showing a voltage that's too high to be real. It's like if your thermometer said it was 200 degrees outside when it's really only 70 degrees.
The vehicle's control module has detected a voltage reading from the hybrid or electric vehicle battery that is higher than expected, indicating a possible sensor or circuit issue.
The P1B93 code is set when the Battery Energy Control Module detects an implausibly high voltage reading from the voltage sense circuit 'A'. This could indicate a fault in the sensor, wiring, or the control module itself.
• Check Engine Light is on
• Reduced fuel efficiency
• Possible limited performance mode
• Faulty battery voltage sensor
• Wiring issues or poor connections in the voltage sense circuit
• Defective Battery Energy Control Module
OBD-II: On-Board Diagnostics, a system that monitors vehicle performance and emissions.
Voltage Sensor: A device that measures the voltage of the battery and sends this information to the control module.
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and its wiring for damage.
• Test the voltage sense circuit for proper operation.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Replace the Battery Energy Control Module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect and maintain battery connections.
• Ensure the battery and its components are kept clean and dry.
• Schedule regular vehicle maintenance checks.
Sensor Issue
• Avoid driving in extreme conditions until the issue is resolved.
• Have the vehicle inspected by a professional technician.
• Monitor the vehicle's performance for any changes.
Check with the vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common with the increase in hybrid and electric vehicles, highlighting the importance of battery management systems.
Moderate – It should be addressed soon to prevent potential battery damage or performance issues.
Ignoring this issue could lead to reduced vehicle performance and potential safety risks.
• Vehicle at operating temperature
• Battery charge level within normal range
The battery voltage sensor is typically located near the hybrid/EV battery pack.
Q: Can I drive my car with a P1B93 code?
A: It's possible, but not recommended for long distances. Get it checked soon to avoid potential issues.
Q: Will this code affect my car's performance?
A: Yes, it might cause reduced performance or efficiency until the issue is resolved.
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.