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 a signal that the engine is cooler than it should be, but the signal is too high, which might mean something is wrong with the sensor or its wiring.
The Engine Coolant Temperature (ECT) Sensor 2 measures the temperature of the engine coolant. A 'circuit high' condition means the sensor is reporting a temperature that is higher than expected, possibly due to a fault.
The ECT Sensor 2 provides data to the engine control module (ECM) about the temperature of the engine coolant. A 'circuit high' code indicates that the sensor is sending a voltage signal that is higher than the normal operating range, suggesting a potential issue with the sensor, its wiring, or the ECM.
• Check Engine Light is on
• Poor fuel economy
• Engine overheating
• Faulty ECT Sensor 2
• Wiring issues (short to voltage)
• Faulty ECM
ECT: Engine Coolant Temperature
ECM: Engine Control Module
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the ECT Sensor 2 for proper operation.
• Replace the ECT Sensor 2 if faulty.
• 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
• Honda Accord
• Ford F-150
• Regularly inspect and maintain engine cooling system.
• Ensure proper coolant levels.
• Check wiring and connectors for wear.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent engine damage.
• Monitor engine temperature closely.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with sensor failures and wiring issues in various vehicle models over the years.
Moderate – Address the issue soon to avoid potential engine damage.
Driving with a faulty ECT sensor can lead to engine overheating, which may cause severe damage and is a safety risk.
• Engine at operating temperature
• Vehicle in a safe location
The ECT Sensor 2 is typically located near the thermostat housing or on the engine block.
Q: Can I drive with a P2185 code?
A: It's not recommended as it may lead to engine overheating and further damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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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.