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 thinks the temperature sensor for the electric motor is saying it's too hot, but it doesn't make sense because it shouldn't be that hot.
This code indicates that the temperature reading from the Drive Motor Inverter Temperature Sensor 'D' is higher than expected, suggesting a possible sensor fault or an actual overheating condition.
The P1AD8 code is triggered when the Powertrain Control Module (PCM) detects that the temperature reading from the Drive Motor Inverter Temperature Sensor 'D' is implausibly high. This could be due to a malfunctioning sensor, wiring issues, or a genuine overheating condition in the drive motor inverter.
• Check Engine Light is on
• Reduced vehicle performance
• Possible overheating warning
• Faulty Drive Motor Inverter Temperature Sensor 'D'
• Wiring or connector issues in the sensor circuit
• Actual overheating of the drive motor inverter
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Verify the code with an OBD-II scanner
• Inspect the wiring and connectors for damage
• Test the temperature sensor for proper operation
• Replace the faulty temperature sensor
• Repair or replace damaged wiring or connectors
• Check and resolve any actual overheating issues
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regularly inspect and maintain cooling systems
• Ensure proper electrical connections
• Monitor vehicle performance for signs of overheating
Sensor Issue
• Avoid driving the vehicle hard until the issue is resolved
• Get the vehicle checked by a professional mechanic
Check with the vehicle manufacturer for specific warranty coverage on sensors and related components.
This code is relatively common in hybrid and electric vehicles where precise temperature monitoring is critical.
Moderate – Should be addressed soon to prevent potential damage to the drive motor inverter.
Driving with this code may lead to reduced vehicle performance and potential overheating, which could be hazardous.
• Vehicle at operating temperature
• Engine running
The Drive Motor Inverter Temperature Sensor 'D' is typically located near the drive motor inverter assembly.
Q: Can I drive with the P1AD8 code?
A: It's not recommended to drive with this code as it may indicate a potential overheating issue.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after the repair is completed.
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