Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car's computer thinks the sensor that checks how hot or cold the battery coolant is, isn't working right. It's like a thermometer for the battery, and it might be saying it's too cold or not working at all.
The P1C44 code is triggered when the hybrid or electric vehicle's control module detects a low voltage signal from the battery pack coolant outlet temperature sensor circuit, indicating a potential issue with the sensor or its wiring.
The P1C44 code indicates that the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) has detected a low voltage condition in the hybrid or electric vehicle battery pack coolant outlet temperature sensor circuit. This sensor is responsible for monitoring the temperature of the coolant exiting the battery pack to ensure it remains within operational limits. A low circuit signal may suggest an open or short circuit, faulty sensor, or poor connection.
• Check Engine Light illuminated
• Reduced hybrid or EV performance
• Possible overheating or undercooling of the battery pack
• Faulty battery pack coolant outlet temperature sensor
• Open or shorted wiring in the sensor circuit
• Poor electrical connection at the sensor or control module
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the P1C44 code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the battery pack coolant outlet temperature sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty battery pack coolant outlet temperature sensor.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Digital multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect and maintain the cooling system.
• Ensure all electrical connections are secure and corrosion-free.
• Perform routine diagnostic checks.
Sensor Issue
• Do not ignore the Check Engine Light; get it checked promptly.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check with the vehicle manufacturer for specific warranty coverage on hybrid/EV components.
This code has become more common with the increased use of hybrid and electric vehicles, as battery cooling systems are critical for performance and longevity.
Moderate – While the vehicle may still operate, ignoring this issue could lead to battery damage or reduced performance.
Driving with a malfunctioning battery cooling system can lead to safety issues. Always address such problems promptly to ensure vehicle safety and compliance with emissions regulations.
• Vehicle must be running and at operating temperature.
• Ensure the cooling system is filled and functioning.
The battery pack coolant outlet temperature sensor is typically located near the battery pack, often integrated into the coolant outlet line.
Q: Can I drive with the P1C44 code?
A: It's best to get the issue checked as soon as possible. Driving for extended periods with this code can lead to battery damage.
Q: How do I reset the P1C44 code?
A: After fixing the issue, you can use an OBD-II scanner to clear the code. If the problem persists, the code will return.
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