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 is getting a signal from the sensor that checks the temperature of the air around the battery, and the signal is higher than it should be. It's like a thermometer telling you it's really hot when it shouldn't be.
The vehicle's control module has detected a high voltage signal from the Hybrid/EV battery pack air temperature sensor circuit.
The P0AAF code indicates that the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) has received a signal from the battery pack air temperature sensor that is above the expected range. This could be due to a malfunctioning sensor, wiring issues, or a problem with the control module itself.
• Check Engine Light illuminated
• Possible battery performance issues
• Reduced fuel efficiency
• Faulty battery pack air temperature sensor
• Damaged or corroded wiring/connectors
• Faulty control module
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code.
• Visually inspect the wiring and connectors for damage or corrosion.
• Test the battery pack air temperature sensor for proper operation.
• Replace the faulty battery pack air temperature sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks of the battery system
• Ensure proper ventilation around the battery pack
• Avoid exposing the vehicle to extreme temperatures
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has been associated with hybrid and electric vehicles as they rely on battery temperature sensors to maintain optimal battery performance.
Moderate – It is important to address this issue to maintain battery health and vehicle performance.
Ignoring this code can lead to reduced battery efficiency and potential overheating, which can be a safety hazard.
• Vehicle in a safe, stationary position
• Battery system at operating temperature
The battery pack air temperature sensor is typically located near or within the battery pack of the vehicle.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to reduced battery efficiency and potential damage to the battery system.
Q: Can I drive my car with this code?
A: It's recommended to have the issue inspected and repaired to avoid further damage to the battery system.
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