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 a sensor that measures the voltage in a part of the electric motor system. It's like a sensor that checks if a battery is working right, but for a car's electric motor.
The P0E91 code indicates an issue with the voltage sensor circuit associated with the Drive Motor B Inverter. This sensor is responsible for monitoring the voltage levels to ensure they are within the expected range.
The Drive Motor B Inverter Voltage Sensor B is part of the hybrid or electric vehicle's powertrain system. It monitors the voltage output of the inverter, which converts DC power from the battery to AC power for the drive motor. A fault in this circuit can lead to improper motor operation or reduced performance.
• Check Engine Light is on
• Reduced vehicle performance
• Unusual noises from the motor
• Faulty voltage sensor
• Wiring issues or poor connections
• Faulty inverter assembly
Inverter: A device that converts DC electricity to AC electricity.
Voltage Sensor: A component that measures the voltage in a circuit.
• Use a scan tool to verify the code
• Inspect the wiring and connections to the voltage sensor
• Test the voltage sensor for proper operation
• Replace the faulty voltage sensor
• Repair or replace damaged wiring
• Replace the inverter assembly if necessary
• OBD-II scan tool
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure proper electrical connections
• Avoid overloading the vehicle's electrical system
Sensor Issue
• Avoid driving the vehicle until repaired
• Consult a professional mechanic
• Do not attempt DIY repairs if unfamiliar with hybrid systems
Check if the vehicle's powertrain warranty covers hybrid system components.
This code is more common in older hybrid models as sensors and wiring can degrade over time.
Moderate – It is advised to address this issue soon to avoid potential damage to the drive motor.
Driving with this issue can lead to decreased performance and potentially unsafe driving conditions.
• Vehicle at operating temperature
• Inverter under load
The Drive Motor B Inverter is typically located near the vehicle's electric motor or battery pack.
Q: Can I drive with a P0E91 code?
A: It's not recommended to drive with this code as it can affect vehicle performance and safety.
Q: How do I reset the P0E91 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
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