Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is saying that a part of the battery system isn't reading the right voltage. It's like when a toy's battery is low and it can't work properly.
This code indicates that the voltage in the 'Y' circuit of the hybrid or electric vehicle's battery system is lower than expected.
The P0BB5 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module detects a voltage signal from the 'Y' circuit of the hybrid/EV battery that is below the expected range. This could be due to a fault in the wiring, connectors, or the battery itself.
• Check Engine Light illuminated
• Reduced fuel efficiency
• Possible loss of electric power
• Faulty battery voltage sensor
• Damaged or corroded wiring or connectors
• Faulty battery control module
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 its wiring for damage.
• Test the battery control module for proper function.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Replace the battery control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks on battery system
• Ensure connectors are clean and secure
• Monitor battery performance regularly
Sensor Issue
• Avoid driving long distances until the issue is fixed.
• Consult with a professional mechanic for diagnosis.
Check with the vehicle manufacturer for battery-related warranty coverage.
This code has been reported in hybrid and electric vehicles as they age, often due to wear and tear in the electrical system.
Moderate – It's important to address this issue to maintain vehicle performance and efficiency.
Driving with a faulty battery system can lead to decreased vehicle performance and efficiency. It is important to address this issue promptly.
• Vehicle must be in 'Ready' mode.
• Battery system should be under load.
The battery voltage sensor is typically located near the hybrid or EV battery pack.
Q: Can I drive with a P0BB5 code?
A: It's not recommended to drive long distances with this code active, as it may affect vehicle performance.
Q: How do I reset the P0BB5 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
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