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 battery's ability to measure voltage. It's like when your toy's battery tester says the battery is weak, even if it's not.
The vehicle's onboard diagnostic system has detected a low voltage condition in the battery pack voltage sense circuit 'E'.
The P0E46 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects that the voltage in the battery pack voltage sense circuit 'E' is below the expected range. This could be due to a wiring issue, a faulty sensor, or a problem with the battery pack itself.
• Illuminated check engine light
• Reduced fuel efficiency
• Possible reduced power or performance
• Faulty battery voltage sensor
• Wiring issues or poor connections in the voltage sense circuit
• Malfunctioning Battery Energy Control Module (BECM)
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 or disconnections.
• Test the voltage sensor for proper operation.
• Repair or replace damaged wiring or connectors in the circuit.
• Replace the faulty battery voltage sensor.
• Reprogram or replace the Battery Energy Control Module (BECM) if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections and wiring.
• Ensure the battery management system is updated.
• Perform routine maintenance checks on hybrid/EV systems.
Sensor Issue
• Avoid driving the vehicle until the issue is diagnosed and repaired.
• Consult with a certified hybrid/EV technician for accurate diagnosis.
Hybrid battery and related components may be covered under a longer warranty period, often 8 years or 100,000 miles.
This code has been more prevalent with the increase in hybrid and electric vehicle usage, highlighting the importance of battery management systems.
Moderate – While the vehicle may still operate, it could lead to reduced efficiency and potential long-term damage if not addressed.
Driving with a malfunctioning battery system can lead to reduced vehicle performance and may not comply with emissions regulations.
• Vehicle in 'Ready' mode
• Battery pack at normal operating temperature
The battery voltage sensor is typically located within or near the hybrid/EV battery pack.
Q: Can I drive my car with this code?
A: It's not recommended to drive with this code as it may lead to reduced performance and efficiency.
Q: Is this a common issue in hybrid vehicles?
A: It can occur, especially in older models or those with high mileage, due to wear and tear on the battery system.
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