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 is having trouble reading how fast the electric motor is spinning. It's like trying to figure out how fast a toy car is going but the speedometer is broken.
The P1E91 code is triggered when the vehicle's control module detects an issue with the RPM (revolutions per minute) reading from the position sensor of Drive Motor 'A'.
The Drive Motor 'A' Position Sensor is responsible for providing the control module with accurate RPM data of the electric motor. If the sensor provides incorrect data or fails to communicate, the control module will set the P1E91 code. This can affect the vehicle's ability to manage motor speed effectively, impacting performance and efficiency.
• Reduced vehicle performance
• Check Engine Light is on
• Unusual noises from the motor
• Faulty Drive Motor 'A' Position Sensor
• Wiring issues or poor connections
• Faulty control module
RPM: Revolutions Per Minute, a measure of how fast something is spinning.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics in vehicles.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the position sensor.
• Test the Drive Motor 'A' Position Sensor for proper operation.
• Replace the Drive Motor 'A' Position Sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II Scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Chevrolet Bolt EV
• Nissan Leaf
• Regular maintenance checks
• Ensure proper electrical connections
• Avoid harsh driving conditions
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional as soon as possible.
Check with the vehicle manufacturer for specific warranty coverage related to the electric motor and sensors.
This code is commonly found in hybrid and electric vehicles as they rely heavily on accurate motor position data for optimal performance.
Moderate – It should be addressed soon to prevent performance issues.
Driving with a known issue can lead to reduced performance and may be unsafe.
• Vehicle at operating temperature
• Motor running under normal conditions
The Drive Motor 'A' Position Sensor is typically located near the electric motor within the drivetrain assembly.
Q: Can I drive with a P1E91 code?
A: It's not recommended to drive for long periods with this code as it can affect vehicle performance.
Q: How do I reset the P1E91 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, it should not return.
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