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 thinks the engine's coolant is too hot, but it might be because the sensor is not working right.
The engine control module (ECM) is receiving a signal from the radiator coolant temperature sensor that indicates the temperature is higher than expected, which may not be accurate.
P3195 indicates that the signal from the radiator coolant temperature sensor is stuck at a high value. This could be due to a malfunctioning sensor, wiring issues, or a problem with the engine control module.
• Engine overheating warning light on
• Poor engine performance
• Possible engine overheating
• Faulty radiator coolant temperature sensor
• Wiring issues such as short circuits or open circuits
• Malfunctioning engine control module (ECM)
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Verify the code with an OBD-II scanner
• Inspect the radiator coolant temperature sensor and its wiring
• Test the sensor for proper operation
• Replace the radiator coolant temperature sensor if faulty
• Repair or replace damaged wiring
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Prius
• Honda Accord
• Ford Focus
• Regularly check coolant levels
• Inspect sensors during routine maintenance
• Ensure proper engine cooling system operation
Sensor Issue
• Do not ignore the engine overheating warning light
• Consult a professional mechanic if unsure
• Avoid driving the vehicle if overheating is suspected
Check vehicle warranty for coverage on sensors and ECM
This code has been associated with sensor failures in vehicles with high mileage or poor maintenance history.
High – Address immediately to prevent engine damage
Driving with an overheating engine can lead to severe damage and safety hazards.
• Engine at normal operating temperature
• Vehicle stationary and idling
The radiator coolant temperature sensor is typically located near the thermostat housing or on the engine block.
Q: Can I drive with a P3195 code?
A: It's not recommended to drive with this code as it may indicate engine overheating.
Q: How do I reset the P3195 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is fixed 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.