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 thinks the temperature sensor for the electric motor is reading too low, like if a thermometer said it was freezing in summer.
The vehicle's control module has detected an implausibly low temperature reading from the drive motor inverter temperature sensor 'D'.
The P1AD7 code is triggered when the Powertrain Control Module (PCM) receives a signal from the drive motor inverter temperature sensor 'D' that indicates an implausibly low temperature. This could be due to a faulty sensor, wiring issues, or a malfunctioning inverter.
• Check Engine Light is on
• Reduced vehicle performance
• Possible overheating of the drive motor
• Faulty temperature sensor
• Wiring issues or poor connections
• Malfunctioning drive motor inverter
PCM: Powertrain Control Module
Inverter: A device that converts DC to AC power in electric vehicles
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connections to the temperature sensor.
• Test the temperature sensor for proper operation.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Replace the drive motor inverter if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks
• Ensure proper cooling system operation
• Inspect wiring for damage periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you're unsure.
• Regularly check for software updates for your vehicle.
Check your vehicle's warranty for coverage on electronic components.
This code has become more common with the increase in hybrid and electric vehicles, where temperature management is critical.
Moderate – It should be addressed soon to prevent potential damage to the drive motor.
Driving with a malfunctioning temperature sensor can lead to overheating and potential safety hazards.
• Vehicle at operating temperature
• Engine running
The drive motor inverter temperature sensor is typically located near the drive motor inverter, often in the engine bay or near the electric motor.
Q: Can I drive my car with this code?
A: It's not recommended as it may lead to overheating and damage.
Q: How can I reset the Check Engine Light?
A: You can use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
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