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 there's something wrong with the way it is reading the battery's voltage. It's like when you think your flashlight batteries are low, but you're not sure if it's the batteries or the flashlight.
The vehicle's control module is detecting an implausibly low voltage reading from the Hybrid/EV battery voltage sense 'I' circuit.
The P1B82 code is triggered when the control module receives a voltage reading from the battery sense 'I' circuit that is lower than expected. This could be due to a fault in the circuit, a bad connection, or an issue with the battery itself.
• Check Engine Light is on
• Reduced fuel efficiency
• Possible reduced vehicle performance
• Faulty battery voltage sensor
• Poor electrical connection in the battery circuit
• Damaged wiring or connectors
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
EV: Electric Vehicle, a vehicle powered by electric motors.
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and its connections.
• Check for damaged wiring in the battery circuit.
• Replace or repair the battery voltage sensor.
• Fix any damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regularly inspect battery connections.
• Ensure the battery is properly maintained.
• Keep the vehicle's software up to date.
Sensor Issue
• Have the vehicle inspected by a professional if you notice performance issues.
• Do not ignore the Check Engine Light.
Check if the vehicle's battery and related components are covered under warranty.
This code has been more common in older hybrid and EV models as battery technology has evolved.
Moderate – It's important to address this issue to prevent potential battery damage.
Driving with a faulty battery sensor can lead to reduced efficiency and potential battery damage.
• Ensure the vehicle is in a safe area.
• Check the battery when the vehicle is off and on.
The battery voltage sensor is typically located near the vehicle's battery pack.
Q: Can I drive my car with a P1B82 code?
A: It's best to have it checked as soon as possible to avoid potential battery issues.
Q: Will this code affect my car's performance?
A: Yes, it can lead to reduced performance and efficiency.
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.