Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that checks how much power is in the hybrid or electric car's battery. It's like a sensor that tells if the battery is okay or not.
The P0B46 code is triggered when the vehicle's powertrain control module (PCM) detects an issue with the voltage sensing circuit for the hybrid or electric vehicle's battery, specifically in circuit 'C'.
The P0B46 code indicates a range or performance problem with the voltage sensing circuit 'C' of the hybrid or electric vehicle's battery. This circuit is responsible for monitoring the voltage levels of the battery to ensure they are within the expected range for optimal performance. If the voltage readings are outside of this range, it can indicate a problem with the sensor, wiring, or the battery itself.
• Check engine light is on
• Reduced fuel economy
• Possible reduced power output
• Faulty battery voltage sensor
• Damaged or corroded wiring/connectors
• Malfunctioning battery management system
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and related wiring for damage or corrosion.
• Test the battery management system for faults.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the battery management system if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks of the battery system
• Ensure connectors and wiring are free from corrosion
• Keep software updated for the battery management system
Sensor Issue
• Do not ignore the check engine light; get it diagnosed promptly.
• Consider visiting a specialist for hybrid or electric vehicles.
• Regularly monitor your vehicle's performance and fuel economy.
Check with your vehicle manufacturer as battery-related components may be covered under warranty.
This code has become more common with the increase in hybrid and electric vehicles, highlighting the importance of battery management systems.
Moderate – It is important to address this issue to prevent potential battery damage or reduced vehicle performance.
Ignoring this issue may lead to further damage or reduced vehicle efficiency. Always follow manufacturer guidelines when servicing your vehicle.
• Vehicle is in a safe, well-ventilated area.
• Battery is fully charged or within normal operating range.
The battery voltage sensor is typically located near the battery pack, often integrated within the battery management system.
Q: Can I drive my car with the P0B46 code?
A: While you may be able to drive the car, it is not recommended as it could lead to further issues with the battery system.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspection of the battery system and ensuring all software updates are applied can help prevent this code.
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