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 detected a problem with the battery's ability to measure its voltage. It's like when a toy's battery meter is broken and can't tell how much power is left.
The vehicle's control module has detected a low voltage reading from the battery voltage sense circuit, which monitors the voltage of the hybrid/EV battery.
The P0B65 code is triggered when the Battery Energy Control Module (BECM) detects that the voltage in the battery voltage sense circuit is lower than the expected range. This could be due to a wiring issue, a faulty sensor, or a problem with 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 Energy Control Module (BECM)
BECM: Battery Energy Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to verify the code.
• Inspect the battery voltage sensor and wiring for damage.
• Test the Battery Energy Control Module (BECM) for proper function.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Replace the Battery Energy Control Module (BECM) if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections.
• Perform scheduled maintenance on the hybrid/EV system.
• Keep the vehicle's software updated.
Sensor Issue
• Avoid driving the vehicle until the issue is diagnosed.
• Consult with a certified hybrid/EV technician.
Battery and related components may be covered under warranty; check with the manufacturer.
This code has been reported in various hybrid and electric vehicles, often due to aging battery systems or poor maintenance.
Moderate – It is important to address this issue to avoid potential battery damage or reduced vehicle performance.
Driving with a malfunctioning battery sensor can lead to unexpected vehicle performance issues.
• Vehicle in 'Ready' mode
• Battery at operating temperature
The battery voltage sensor is typically located within the battery pack or near the Battery Energy Control Module.
Q: Can I drive my car with a P0B65 code?
A: It's not recommended to drive the vehicle as it may lead to further damage or reduced performance.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the battery system can help prevent this issue.
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