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 that the voltage going to one of the electric motors is too high. It's like when you plug a device into a socket with too much electricity, which can be dangerous.
The P1AEF code is triggered when the powertrain control module (PCM) detects a higher than expected voltage in the high-voltage circuit associated with Drive Motor 'B'.
The P1AEF code is set when the PCM identifies an abnormally high voltage condition in the high-voltage circuit of Drive Motor 'B'. This can be due to a malfunction in the inverter, wiring, or the motor itself, potentially leading to damage if not addressed.
• Check Engine Light illuminated
• Reduced vehicle performance
• Unusual noises from the drive motor
• Vehicle may not start
• Faulty inverter
• Damaged or shorted wiring in the high-voltage circuit
• Malfunctioning Drive Motor 'B'
• Faulty PCM
PCM: Powertrain Control Module
Inverter: A device that converts DC electricity to AC electricity for use by the electric motor.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the inverter and drive motor for proper operation.
• Check the PCM for faults.
• Repair or replace damaged wiring or connectors.
• Replace the faulty inverter.
• Replace the malfunctioning drive motor.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Insulated tools for high-voltage systems
$500 - $2000
Difficult
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance of the electrical system
• Avoiding exposure to extreme temperatures
• Ensuring all recalls and service bulletins are up to date
Electrical System Issue
• Do not attempt to drive the vehicle if the Check Engine Light is on and performance is reduced.
• Consult with a qualified technician for diagnosis and repair.
High-voltage components may be covered under the vehicle's powertrain or hybrid system warranty.
This code is more common in hybrid and electric vehicles due to their complex high-voltage systems.
High – Immediate attention is required to prevent potential damage to the vehicle's electrical system.
High-voltage systems can be dangerous. Only trained professionals should attempt repairs.
• Vehicle at operating temperature
• High-voltage system active
Drive Motor 'B' is typically located near the vehicle's transmission or axle, depending on the vehicle's design.
Q: Can I drive my car with this code?
A: It's not recommended to drive your car with this code active, as it can lead to further damage.
Q: Is this repair covered by warranty?
A: It may be covered under the powertrain or hybrid system warranty. Check with your dealer.
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