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 computer in your car has detected a problem with the power supply to a part that helps control the electric motor. It's like when a toy's battery isn't working right.
The P1E4E code is triggered when the power supply voltage to the inverter transistor for Drive Motor 'B' is higher than the expected range.
The inverter transistor is a critical component in electric and hybrid vehicles, responsible for converting DC power from the battery to AC power for the motor. If the power supply voltage is too high, it can indicate a fault in the power supply circuit, potentially causing damage to the inverter or motor.
• Check Engine Light is on
• Reduced vehicle performance
• Unusual noises from the motor area
• Faulty inverter transistor
• Wiring or connector issues
• Defective power supply circuit
Inverter: A device that converts DC power to AC power.
Transistor: A semiconductor device used to amplify or switch electronic signals.
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the inverter transistor and power supply circuit for faults.
• Replace faulty inverter transistor.
• Repair or replace damaged wiring or connectors.
• Replace defective power supply components.
• OBD-II scanner
• Multimeter
• Screwdriver set
$200 - $1000
Difficult
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks
• Ensure proper battery voltage levels
• Inspect wiring for wear and tear
Power Supply Issue
• Do not drive the vehicle until the issue is resolved.
• Consult a professional mechanic for diagnosis.
Check with your vehicle manufacturer for warranty coverage on hybrid or electric components.
This code has been associated with electric and hybrid vehicles as they rely heavily on inverter systems for motor control.
High – This issue can lead to further damage if not addressed promptly.
Driving with this code may not be safe and could lead to further vehicle damage.
• Vehicle must be in a safe, stationary position.
• Ensure battery is fully charged.
The inverter transistor is typically located near the vehicle's electric motor or battery pack.
Q: Can I drive my car with a P1E4E code?
A: It's not recommended to drive until the issue is fixed, as it could cause further damage.
Q: How can I prevent this issue?
A: Regular maintenance and inspections of the electrical system can help prevent this issue.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.