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 temperatures of the engine's coolant and oil aren't matching up like they should. It's like if you had a fever but your hands felt cold.
The engine control module (ECM) monitors the engine coolant temperature and engine oil temperature to ensure they correlate properly during engine operation. If the temperatures do not correlate as expected, the ECM will set the P012F code.
The P012F code is triggered when the ECM detects a discrepancy between the engine coolant temperature (ECT) sensor and the engine oil temperature (EOT) sensor readings. This could indicate a problem with one of the sensors, a wiring issue, or a mechanical problem affecting the engine's cooling or lubrication systems.
• Check Engine Light is on
• Engine overheating
• Poor fuel economy
• Faulty engine coolant temperature sensor
• Faulty engine oil temperature sensor
• Wiring issues or poor connections
ECM: Engine Control Module
ECT: Engine Coolant Temperature
EOT: Engine Oil Temperature
• Use an OBD-II scanner to confirm the code.
• Inspect the ECT and EOT sensors and their wiring for damage.
• Compare live data from both sensors to verify correlation.
• Replace the faulty sensor (ECT or EOT).
• Repair or replace damaged wiring or connectors.
• Flush and refill engine coolant or oil if contaminated.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain coolant and oil levels.
• Inspect sensors and wiring during routine maintenance.
• Ensure proper engine cooling system operation.
Sensor Issue
• Do not ignore the Check Engine Light; get it checked promptly.
• Monitor engine temperature gauge while driving.
• Schedule regular maintenance checks.
Sensor-related repairs may be covered under the vehicle's powertrain warranty. Check with your dealer.
This code has become more common with the increased use of advanced engine management systems that monitor multiple parameters for optimal performance.
Moderate – Should be addressed soon to prevent potential engine damage.
Driving with an unresolved P012F code could lead to engine overheating, which may cause severe engine damage and pose a safety risk.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The ECT sensor is typically located near the thermostat housing, while the EOT sensor is often found near the oil filter or oil pan.
Q: Can I drive with a P012F code?
A: It's not recommended to drive for extended periods with this code, as it may lead to engine overheating.
Q: Will a P012F code clear itself?
A: The code may clear if the underlying issue is resolved, but it's best to use an OBD-II scanner to confirm.
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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.