Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor that checks the temperature of the coolant for the hybrid or electric car's battery. It's like a thermometer not working properly.
The sensor that monitors the temperature of the coolant in the hybrid/EV battery pack is reporting a voltage that is too low, indicating a possible issue with the sensor or its circuit.
The P2E76 code is triggered when the powertrain control module (PCM) detects a low voltage signal from the Hybrid/EV Battery Pack Coolant Temperature Sensor D. This sensor is responsible for monitoring the temperature of the coolant that helps keep the battery pack at optimal operating temperatures. A low circuit condition could indicate a short to ground, a faulty sensor, or a wiring issue.
• Check engine light on
• Reduced fuel efficiency
• Possible overheating of the battery pack
• Faulty coolant temperature sensor
• Wiring issues (short to ground or open circuit)
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the coolant temperature sensor for proper operation.
• Replace the faulty coolant temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Digital multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect and maintain vehicle wiring.
• Ensure coolant levels are adequate.
• Schedule regular vehicle check-ups.
Sensor Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional as soon as possible.
Check with your vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common as hybrid and electric vehicles have increased in popularity, highlighting the importance of battery thermal management.
Moderate – It should be addressed soon to prevent potential battery damage.
Ignoring this issue could lead to reduced vehicle performance and potential safety risks.
• Vehicle at operating temperature
• Battery pack under normal load
The coolant temperature sensor is typically located near the battery pack within the vehicle's cooling system.
Q: Can I drive my car with this code?
A: It's not recommended to drive for extended periods with this code active, as it may lead to battery overheating.
Q: How often should I check my vehicle's coolant system?
A: It's a good idea to have your vehicle's coolant system checked during regular maintenance intervals.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when coolant-temperature and warm-up faults indicate a thermostat-related issue.
Coolant-temperature and warm-up faults often lead to thermostat testing and replacement.
Thermostats are vehicle-specific and should be matched by engine and housing style.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.