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 sensor that checks the temperature of the alternative fuel tank is reading a temperature that is too high.
The P01AD code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the alternative fuel tank temperature sensor, indicating a higher than normal temperature reading.
The alternative fuel tank temperature sensor monitors the temperature of the fuel in the tank. When the sensor sends a voltage signal that is higher than the expected range, the ECM interprets this as a high temperature condition. This could be due to a faulty sensor, wiring issues, or actual high temperatures in the tank.
• Check Engine Light is on
• Possible fuel efficiency issues
• Inaccurate fuel temperature readings
• Faulty alternative fuel tank temperature sensor
• Wiring issues such as short circuits or open circuits
• Actual high temperature in the fuel tank
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the alternative fuel tank temperature sensor for correct operation.
• Replace the alternative fuel tank temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Ensure proper fuel tank ventilation to prevent overheating.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regularly inspect and maintain fuel system components.
• Ensure proper ventilation of the fuel tank.
• Use quality fuel to prevent overheating.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Monitor fuel efficiency for any changes.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code is commonly associated with vehicles that use alternative fuels and have temperature monitoring systems in place.
Moderate – It should be addressed soon to prevent potential fuel system issues.
Driving with a malfunctioning fuel system sensor can lead to inefficient fuel use and potential safety hazards.
• Engine running at normal operating temperature
• Vehicle stationary
The alternative fuel tank temperature sensor is typically located on or near the fuel tank.
Q: Can I drive with a P01AD code?
A: It's not recommended to drive for extended periods with this code, as it can lead to inefficient fuel use and potential safety issues.
Q: How is the alternative fuel tank temperature sensor tested?
A: A multimeter can be used to check the sensor's resistance and voltage output to ensure it is operating within specifications.
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