Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps connect the big battery to the rest of the car. It's like a switch that isn't working right.
The P0AE0 code is triggered when the control circuit for the hybrid or electric vehicle's battery negative contactor is reading a high voltage. This indicates a potential issue with the circuit's ability to properly control the contactor.
The hybrid/EV battery negative contactor is responsible for connecting and disconnecting the high-voltage battery from the vehicle's electrical system. A 'high' circuit condition typically means there is excessive voltage detected, which could be due to an open circuit, a short to voltage, or a faulty control module.
• Check Engine Light is on
• Vehicle may not start
• Reduced performance from the hybrid/EV system
• Warning lights on the dashboard
• Faulty negative contactor
• Open or shorted wiring in the control circuit
• Defective battery management system (BMS)
• Corroded or loose electrical connections
Contactor: An electrically controlled switch used for switching a power circuit.
BMS: Battery Management System, which manages the power flow in and out of a battery.
• Perform a visual inspection of the contactor and wiring
• Check for any blown fuses related to the battery system
• Use a multimeter to test the voltage and continuity of the circuit
• Scan the vehicle's computer for additional trouble codes
• Replace the faulty negative contactor
• Repair or replace damaged wiring
• Clean and secure electrical connections
• Replace or reprogram the battery management system
• OBD-II scanner
• Multimeter
• Wrench set
$300 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect electrical connections for corrosion
• Ensure proper maintenance of the battery system
• Avoid extreme temperatures which can affect battery components
Electrical Circuit Issue
• Do not attempt to drive the vehicle until the issue is diagnosed and repaired
• Consult with a certified hybrid/EV technician for accurate diagnosis
• Regular maintenance checks can prevent such issues
Check with the manufacturer for warranty coverage on hybrid/EV battery components.
This code has been more common with the increase in hybrid and electric vehicles, highlighting the importance of proper battery management.
High – This issue can prevent the vehicle from operating safely and efficiently.
Driving with an unresolved battery contactor issue may lead to vehicle breakdowns and potential safety hazards.
• Vehicle must be in 'Ready' mode
• Battery system must be engaged
The battery negative contactor is typically located near the hybrid/EV battery pack, often in the rear of the vehicle.
Q: Can I drive my car with a P0AE0 code?
A: It's not recommended, as this code indicates a problem with the battery connection, which can affect vehicle safety and performance.
Q: How do I reset the P0AE0 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return, indicating further diagnosis is needed.
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