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 detected a problem with the way it reads the voltage from the hybrid or electric vehicle's battery. It's like when your game console can't read the battery level correctly and might think it's full when it's not.
The P0B73 code indicates an issue with the voltage sensing circuit for the low side of the hybrid or EV battery. This can affect the vehicle's ability to monitor battery performance accurately.
The P0B73 code is triggered when the Powertrain Control Module (PCM) detects that the voltage reading from the 'L' (low) circuit of the hybrid/EV battery is outside the expected range or shows performance issues. This could be due to wiring problems, sensor failure, or issues within the battery management system.
• Check engine light illuminated
• Reduced fuel efficiency
• Limited power output
• Faulty battery voltage sensor
• Damaged or corroded wiring/connectors
• Battery management system malfunction
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
EV: Electric Vehicle
• Use an OBD-II scanner to confirm the code.
• Inspect battery voltage sensor and wiring for damage.
• Test the battery management system for faults.
• Replace faulty battery voltage sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace battery management system if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery and wiring for damage.
• Keep software updated in hybrid/EV systems.
• Avoid extreme temperature exposure for the battery.
Sensor Issue
• Avoid long trips until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check if the vehicle's battery and related components are covered under warranty, especially if the vehicle is relatively new.
This code has become more prevalent with the increase in hybrid and electric vehicles, highlighting the importance of proper battery management systems.
Moderate – It's important to address this issue soon to prevent potential battery damage or reduced vehicle performance.
Ignoring this code could lead to decreased vehicle performance and potential safety hazards. It is advised to address the issue promptly.
• Vehicle at operating temperature
• Battery fully charged
The battery voltage sensor is typically located near the hybrid/EV battery pack, often within the battery management system module.
Q: Can I drive my car with a P0B73 code?
A: It's possible, but not recommended as it may lead to reduced performance and potential battery damage.
Q: How do I clear a P0B73 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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