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 is having trouble reading the voltage from one part of the hybrid or electric vehicle's battery. It's like if your game console couldn't tell how much battery life was left in the controller.
The car's computer monitors the voltage of each section of the hybrid or EV battery to ensure everything is working correctly. If it can't read the voltage from one section, it triggers this code.
The P0B8B code is set when the Powertrain Control Module (PCM) detects an issue with the voltage sensing circuit 'Q' of the hybrid/EV battery. This could be due to a faulty sensor, wiring issues, or a problem with the battery itself.
• Check Engine Light illuminated
• Reduced fuel efficiency
• Possible reduced power or performance
• Faulty battery voltage sensor
• Damaged or corroded wiring/connectors
• Defective hybrid/EV battery pack
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and related wiring for damage.
• Check the battery pack for any signs of damage or corrosion.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring/connectors.
• Replace the hybrid/EV battery pack if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $1500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections.
• Perform routine maintenance checks.
• Avoid deep discharging of the battery.
Sensor Issue
• Do not ignore the Check Engine Light; get the vehicle inspected.
• Avoid driving long distances until the issue is resolved.
Check with the vehicle manufacturer for battery and sensor warranty coverage.
This code has become more common as hybrid and electric vehicles have increased in popularity.
Moderate – It should be addressed soon to avoid potential battery damage.
Driving with a malfunctioning battery sensor can lead to reduced performance and efficiency.
• Vehicle in 'Ready' mode
• Battery at normal operating temperature
The battery voltage sensor is typically located within the battery pack or near the battery control module.
Q: Can I drive my car with this code?
A: It's possible, but not recommended as it may lead to reduced performance and efficiency.
Q: How do I reset the code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
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