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 found a problem with how it checks the battery's voltage. It's like if you had a toy with a battery, and the toy couldn't tell if the battery was full or empty.
The P0E45 code indicates that there is an issue with the voltage sensing circuit for the hybrid or electric vehicle's battery pack. The circuit is not reading the voltage correctly, which could affect the vehicle's performance.
The P0E45 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects a voltage reading from the battery pack voltage sense circuit that is outside the expected range. This could be due to a fault in the circuit, a connection issue, or a problem with the battery pack itself.
• Check Engine Light is on
• Reduced fuel efficiency
• Possible reduced power output
• Faulty battery voltage sensor
• Damaged wiring or connectors in the voltage sense circuit
• Battery pack issues or degradation
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and related wiring for damage.
• Test the battery pack's voltage and performance.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Service or replace the battery pack if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $1000
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of the battery system
• Ensure all electrical connections are secure
• Monitor battery health periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure about repairs.
Battery-related issues may be covered under the vehicle's hybrid or EV warranty.
The P0E45 code has been more common as hybrid and electric vehicles have become more prevalent, highlighting the importance of battery health monitoring.
Moderate – While the vehicle may still be drivable, addressing the issue promptly can prevent further damage.
Ignoring battery-related issues can lead to reduced vehicle performance and potential safety hazards.
• Vehicle in 'Ready' mode
• Battery at normal operating temperature
The battery voltage sensor is typically located near or integrated into the hybrid/EV battery pack.
Q: Can I drive my car with a P0E45 code?
A: While the car may still be drivable, it's important to have it checked to prevent further issues.
Q: Does this code mean I need a new battery?
A: Not necessarily. The issue could be with the sensor or wiring. A professional diagnosis is recommended.
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