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 it thinks it's really cold when it shouldn't be.
The P1B65 code indicates that the temperature sensor in the drive motor inverter circuit is sending a signal that is too low, suggesting an implausible or incorrect reading.
The drive motor inverter temperature sensor 'B' is responsible for monitoring the temperature of the inverter, which is a component that converts DC to AC power for the electric motor. An implausibly low reading suggests a potential fault in the sensor or its circuit, which could lead to incorrect temperature management of the inverter.
• Check Engine Light illuminated
• Reduced vehicle performance
• Potential overheating of the inverter
• Faulty temperature sensor
• Wiring issues such as shorts or open circuits
• Faulty inverter control module
Inverter: A device that converts DC to AC power.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics in vehicles.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connections to the temperature sensor for damage or corrosion.
• Test the temperature sensor for proper operation using a multimeter.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Replace the inverter control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks of the electrical system
• Ensure proper cooling system function
• Avoid overloading the vehicle's electrical system
Sensor Issue
• Do not ignore the Check Engine Light; get it diagnosed soon.
• Avoid heavy loads or high-speed driving until the issue is resolved.
Check with your vehicle manufacturer; sensor issues may be covered under powertrain or emissions warranty.
This code is more common in hybrid and electric vehicles due to their reliance on inverter systems.
Moderate – While the vehicle may still be drivable, ignoring this issue could lead to further damage.
Driving with a faulty 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 inverter assembly, often in the engine bay.
Q: Can I drive with a P1B65 code?
A: It's not recommended to drive for extended periods, as it could lead to overheating and damage.
Q: How do I reset the Check Engine Light?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the light should stay off.
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