Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble reading the temperature of the engine coolant because one of the sensors isn't working right.
The Engine Control Module (ECM) is not receiving the correct signal from the third engine coolant temperature sensor.
The P01E3 code indicates that the ECM has detected a malfunction in the circuit for the third engine coolant temperature sensor. This sensor is responsible for providing data about the engine's coolant temperature, which is crucial for engine performance and emissions control.
• Check Engine Light is on
• Poor fuel economy
• Engine overheating
• Faulty engine coolant temperature sensor 3
• Damaged or corroded wiring/connectors
• Faulty ECM
ECM: Engine Control Module, the computer that controls the engine.
OBD-II: On-Board Diagnostics, a system that monitors vehicle performance.
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage or corrosion
• Test the sensor with a multimeter to check resistance
• Replace the faulty engine coolant temperature sensor
• Repair or replace damaged wiring/connectors
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain cooling system components
• Ensure proper coolant levels
• Perform routine vehicle diagnostics
Sensor Issue
• Do not ignore the Check Engine Light
• Address overheating issues promptly
Repairs may be covered under powertrain warranty if the vehicle is still within the warranty period.
This code has been reported in vehicles with high mileage or poor maintenance of the cooling system.
Moderate – Should be addressed soon to avoid potential engine damage.
Driving with an unresolved engine temperature issue can lead to engine damage and is not recommended.
• Engine at operating temperature
• Stable idle conditions
The engine coolant temperature sensor 3 is typically located near the thermostat housing or in the engine block.
Q: Can I drive with a P01E3 code?
A: It's not recommended as it can lead to engine overheating and damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
High-End · Full-system diagnostics
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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.