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 temperature of the air going into the engine is not believable. It's like when you check the weather and it says it's 100 degrees outside, but you're wearing a winter coat because it's actually freezing.
The code is triggered when the intake air temperature sensor reports a temperature reading that is not plausible, indicating a potential sensor malfunction or wiring issue.
The Intake Air Temperature (IAT) sensor measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to optimize fuel delivery and ignition timing. If the sensor reports a temperature that is outside of the expected range, the ECM will set a P111F code.
• Check Engine Light is on
• Poor fuel economy
• Engine performance issues
• Faulty intake air temperature sensor
• Wiring issues or poor electrical connections
• ECM software glitch
ECM: Engine Control Module
IAT: Intake Air Temperature
• Use an OBD-II scanner to confirm the P111F code.
• Inspect the IAT sensor and its wiring for damage or disconnection.
• Check the sensor's resistance with a multimeter to ensure it is within specifications.
• Replace the faulty intake air temperature sensor.
• Repair or replace damaged wiring or connectors.
• Update the ECM software if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly inspect sensors and wiring for damage.
• Keep the engine bay clean to prevent sensor contamination.
• Ensure proper electrical connections.
Sensor Issue
• Avoid driving aggressively until the issue is resolved.
• Monitor fuel consumption for any unusual changes.
Check with your vehicle manufacturer for warranty coverage on emission-related components.
This code is commonly associated with BMW vehicles and often relates to sensor or wiring issues.
Moderate – It is recommended to address this issue soon to prevent potential engine performance problems.
Driving with a faulty sensor can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The intake air temperature sensor is typically located in the air intake duct or integrated into the mass airflow sensor housing.
Q: Can I drive with a P111F code?
A: While it's possible to drive, it's not recommended as it can lead to poor engine performance and increased emissions.
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, or the light may turn off automatically after several driving cycles if the problem is resolved.
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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
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
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.