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 found a problem with one of the temperature sensors in the battery of a hybrid or electric vehicle. It's like when a thermometer isn't working right and can't tell you the correct temperature.
The P0BC2 code indicates an issue with the electrical circuit of the temperature sensor labeled 'E' in the battery pack of a hybrid or electric vehicle.
The P0BC2 code is triggered when the Powertrain Control Module (PCM) or Battery Management System (BMS) detects an abnormal voltage or resistance in the circuit of the battery temperature sensor 'E'. This sensor is responsible for monitoring the temperature of the battery cells to ensure they operate within safe limits.
• Check Engine Light is on
• Reduced battery performance
• Possible overheating of the battery
• Faulty battery temperature sensor
• Damaged or corroded wiring/connectors
• Faulty PCM or BMS
PCM: Powertrain Control Module
BMS: Battery Management System
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the battery temperature sensor for proper operation.
• Replace the faulty battery temperature sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the PCM/BMS if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections.
• Ensure the battery cooling system is functioning properly.
• Perform routine maintenance as recommended by the manufacturer.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice reduced battery performance.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check with your vehicle manufacturer, as some components may be covered under warranty, especially in newer vehicles or those with extended warranties.
This code has become more common with the increased prevalence of hybrid and electric vehicles, as these vehicles rely heavily on battery management systems.
Moderate – While the vehicle may still be drivable, it's important to address this issue to prevent potential battery damage.
Ignoring this code may lead to battery damage or reduced vehicle performance, which could affect safety.
• Vehicle at operating temperature
• Battery under load conditions
The battery temperature sensor is typically located within the battery pack of the hybrid or electric vehicle.
Q: Can I drive with a P0BC2 code?
A: While you may be able to drive, it's not recommended as it can lead to battery damage or reduced performance.
Q: How do I reset the P0BC2 code?
A: You can reset the code with an OBD-II scanner, but it's important to fix the underlying issue first.
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