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 getting confusing signals from a sensor that helps start the car. It's like trying to watch a TV show with a bad signal that keeps cutting out.
The vehicle's high voltage starter generator position sensor is sending signals that don't make sense, indicating an issue with the sensor or its circuit.
The P1E31 code is triggered when the Powertrain Control Module (PCM) or other control module detects an implausible frequency signal from the high voltage starter generator position sensor. This sensor is responsible for providing the position of the starter generator, which is crucial for the proper functioning of the hybrid or electric vehicle system.
• Check Engine Light is on
• Vehicle may not start or have difficulty starting
• Reduced fuel efficiency or performance
• Faulty high voltage starter generator position sensor
• Wiring issues or poor connections in the sensor circuit
• Faulty PCM or control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connections to the position sensor
• Test the sensor's output with a multimeter
• Repair or replace damaged wiring or connectors
• Replace the faulty position sensor
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Cadillac ELR
• Chevrolet Malibu Hybrid
• Regular maintenance checks
• Ensure all electrical connections are secure
• Avoid exposure to extreme temperatures
Sensor Issue
• Do not ignore the Check Engine Light
• Have the vehicle inspected by a professional
• Avoid driving the vehicle if it shows signs of starting issues
Check with your vehicle manufacturer for warranty coverage on hybrid or electric system components.
This code is more common in hybrid and electric vehicles due to their reliance on high voltage systems.
Moderate – While the vehicle may still operate, it is important to address this issue to prevent further damage.
Driving with a malfunctioning starter generator can lead to unexpected vehicle shutdowns, posing a safety risk.
• Vehicle at normal operating temperature
• Ensure all electrical systems are active
The high voltage starter generator position sensor is typically located near the starter generator assembly, often in the engine bay.
Q: Can I drive with a P1E31 code?
A: It's not recommended to drive with this code as it may lead to further damage or starting issues.
Q: How can I prevent this code from appearing?
A: Regular maintenance and ensuring all electrical connections are secure can help prevent this issue.
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