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 a sensor in the car that checks the temperature of the coolant for the hybrid or electric vehicle's electronics is not working properly. It's like a thermometer not showing the right temperature.
The P2B26 code is triggered when the powertrain control module (PCM) detects a low voltage signal from the Hybrid/EV electronics coolant temperature sensor C.
The Hybrid/EV electronics coolant temperature sensor C is responsible for monitoring the temperature of the coolant used to cool the electronic components of a hybrid or electric vehicle. A low circuit condition indicates that the sensor is sending a voltage signal that is lower than the expected range, which could be due to a faulty sensor, wiring issues, or a problem with the PCM.
• Check engine light illuminated
• Possible overheating of electronic components
• Reduced vehicle performance
• Faulty coolant temperature sensor
• Wiring issues such as short circuits or open circuits
• Faulty PCM (Powertrain Control Module)
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
$100 - $300
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect and maintain coolant levels.
• Ensure proper maintenance of electrical connections.
• Schedule regular vehicle check-ups.
Sensor Issue
• Do not ignore the check engine light.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for specific warranty coverage on hybrid/EV components.
This code is relatively common in hybrid and electric vehicles as they rely heavily on electronic components that require cooling.
Moderate – It is important to address this issue to prevent potential overheating of electronic components.
Driving with a malfunctioning coolant temperature sensor can lead to overheating, which may cause damage to electronic components.
• Vehicle should be in a safe location.
• Engine should be off and cool before inspection.
The coolant temperature sensor is typically located near the coolant reservoir or along the coolant lines in the engine bay.
Q: Can I drive my car with this code?
A: It's not recommended as it may lead to overheating of electronic components.
Q: How can I reset the check engine light?
A: You can use an OBD-II scanner to clear the code, but it's important to fix the underlying issue first.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector 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.