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 is getting unusual readings from one of the sensors that checks how hot or cold the engine is. It's like a thermometer for the engine, and it's not working right.
The engine control module (ECM) is detecting a problem with the readings from the third engine coolant temperature sensor. The readings are outside the expected range.
The P01E4 code indicates that the Engine Coolant Temperature Sensor 3 is reporting a temperature that is outside the normal operating range expected by the ECM. This could be due to a sensor malfunction, wiring issues, or a problem with the engine's cooling system.
• Check Engine Light is on
• Engine overheating
• Poor fuel economy
• Faulty engine coolant temperature sensor
• Wiring issues or poor electrical connections
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors to the sensor.
• Test the sensor's resistance and compare it with specifications.
• Replace the faulty engine coolant temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly check and maintain coolant levels.
• Inspect and replace sensors as part of routine maintenance.
• Ensure proper electrical connections.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Monitor engine temperature closely.
Sensor-related repairs may be covered under the vehicle's powertrain warranty.
This code has been associated with sensor failures and wiring issues in vehicles over 5 years old.
Moderate – Addressing this issue promptly can prevent engine overheating.
Driving with an overheating engine can lead to severe engine damage and is unsafe.
• Engine at operating temperature
• Vehicle stationary
The engine coolant temperature sensor is typically located near the thermostat housing or on the engine block.
Q: Can I drive with a P01E4 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to engine overheating.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to clear the code after the repair is complete.
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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.