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 seeing a mismatch between the temperature of the engine coolant and the air coming into the engine. It's like if you expected your bath water to be warm, but it feels cold instead.
The P011B code is triggered when the Powertrain Control Module (PCM) detects that the engine coolant temperature (ECT) and the intake air temperature (IAT) do not correlate as expected.
The PCM monitors the engine coolant temperature and the intake air temperature to ensure they are within a certain range of each other. If the temperatures do not correlate, meaning the difference between them is larger or smaller than expected, the PCM sets the P011B code. This could indicate a problem with one of the sensors or an actual temperature issue.
• Check Engine Light is on
• Poor fuel economy
• Engine overheating or running cold
• Engine performance issues
• Faulty engine coolant temperature sensor
• Faulty intake air temperature sensor
• Wiring issues or poor connections
• Thermostat stuck open or closed
• PCM issues
PCM: Powertrain Control Module
ECT: Engine Coolant Temperature
IAT: Intake Air Temperature
• Use an OBD-II scanner to confirm the code.
• Inspect the ECT and IAT sensors and their wiring.
• Check for any obvious signs of damage or corrosion.
• Measure the resistance of the sensors to ensure they are within specifications.
• Verify the thermostat is functioning correctly.
• Replace the faulty engine coolant temperature sensor.
• Replace the faulty intake air temperature sensor.
• Repair or replace damaged wiring or connectors.
• Replace the thermostat if it is faulty.
• Update or reprogram the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain coolant levels.
• Inspect sensors and wiring during routine maintenance.
• Ensure the thermostat is functioning properly.
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent sensor issues.
Check with your vehicle manufacturer; some sensor issues may be covered under warranty.
The P011B code has been more commonly reported in vehicles with higher mileage or those that have not had regular maintenance.
Moderate – While the vehicle may still be drivable, it's important to address the issue to prevent potential engine damage.
Ignoring this code could lead to further engine damage or reduced performance. Always ensure your vehicle is safe to drive.
• Engine at operating temperature
• Vehicle in a controlled environment
The engine coolant temperature sensor is usually located near the thermostat housing, while the intake air temperature sensor is often located in the air intake duct.
Q: Can I drive with a P011B code?
A: While you may be able to drive, it's best to get it checked soon to avoid potential engine damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and checking the condition of sensors and wiring can help prevent this issue.
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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.