Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that a sensor checking the temperature of the motor is showing it's too hot.
This code indicates that the temperature sensor for Drive Motor 'A' is reading a temperature that is too high, which is outside the expected range.
The P1A8B code is triggered when the Powertrain Control Module (PCM) detects a temperature reading from the Drive Motor 'A' temperature sensor that is outside the normal operating range, indicating a potential issue with the sensor or the motor's cooling system.
• Check Engine Light is on
• Reduced vehicle performance
• Overheating warnings
• Faulty Drive Motor 'A' temperature sensor
• Cooling system malfunction
• Wiring issues or poor connections
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 temperature sensor.
• Check the cooling system for leaks or blockages.
• Replace the Drive Motor 'A' temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Fix any issues with the cooling system.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance of the cooling system
• Routine checks on wiring and connectors
• Monitoring motor temperature readings
Sensor Issue
• Avoid driving the vehicle until the issue is diagnosed.
• Consult with a professional mechanic for a thorough inspection.
Check with the vehicle manufacturer for warranty coverage on the drive motor and sensors.
This code has been reported in hybrid and electric vehicles where motor temperature monitoring is crucial.
High – Overheating can cause severe damage to the motor.
Driving with an overheating motor can lead to breakdowns or accidents. Address this issue promptly.
• Vehicle at operating temperature
• Drive motor under load
The Drive Motor 'A' temperature sensor is typically located near the drive motor, often integrated into the motor housing.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to severe motor damage due to overheating, potentially resulting in costly repairs.
Q: Can I drive my car with this code?
A: It is not recommended to drive your car with this code active, as it indicates a potential overheating issue.
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