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 noticing that the temperature of the engine coolant and the outside air don't match up like they should. It's like when you expect it to be cold outside, but your thermometer says it's hot.
The car's computer compares the readings from the engine coolant temperature sensor and the ambient air temperature sensor. If the readings are not within an expected range of each other, it triggers this code.
The P011F code is triggered when the Powertrain Control Module (PCM) detects a discrepancy between the engine coolant temperature sensor 2 and the ambient air temperature sensor. The PCM expects these two temperatures to correlate within a certain range under specific conditions. If the correlation is outside the expected range, the PCM sets the P011F code.
• Check Engine Light is on
• Engine may run rough
• Poor fuel economy
• Inaccurate temperature readings
• Faulty engine coolant temperature sensor
• Faulty ambient air temperature sensor
• Wiring issues or poor connections
• PCM software issue
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the engine coolant temperature sensor and wiring.
• Inspect the ambient air temperature sensor and wiring.
• Check for any software updates for the PCM.
• Replace the engine coolant temperature sensor if faulty.
• Replace the ambient air temperature sensor if faulty.
• Repair or replace any damaged wiring or connectors.
• Update PCM software if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain sensors.
• Ensure proper coolant levels.
• Perform routine vehicle diagnostics.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light comes on.
• Avoid driving the vehicle for long distances until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on sensors.
This code has been more common in vehicles with aging sensors and wiring, particularly in older models.
Moderate – It should be addressed soon to avoid potential engine performance issues.
Driving with a malfunctioning temperature sensor can lead to overheating, which may cause engine damage.
• Engine at operating temperature
• Vehicle parked in a stable ambient temperature environment
The engine coolant temperature sensor is usually located near the thermostat housing, while the ambient air temperature sensor is often located near the front grille or bumper.
Q: Can I drive with the P011F code?
A: It's not recommended to drive for long distances with this code as it can lead to engine performance issues.
Q: How can I reset the P011F code?
A: After fixing the issue, you can use an OBD-II scanner to reset the code.
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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.