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 there's too much air pressure in the engine compared to how open the throttle is. It's like the engine is breathing in too much air when it shouldn't be.
The P112F code is triggered when the engine control module (ECM) detects that the manifold absolute pressure (MAP) is higher than expected for the given throttle angle.
The ECM monitors the manifold absolute pressure sensor and the throttle position sensor to ensure they are in sync. If the MAP sensor reads a higher pressure than what the throttle angle suggests, it indicates a potential issue with the air intake system or sensor malfunction.
• Check Engine Light is on
• Poor engine performance
• Rough idle
• Faulty MAP sensor
• Vacuum leak in the intake system
• Throttle body malfunction
MAP Sensor: Manifold Absolute Pressure Sensor, measures the air pressure in the intake manifold.
Throttle Angle: The position of the throttle plate, which controls air flow into the engine.
• Use an OBD-II scanner to confirm the P112F code.
• Inspect the MAP sensor and wiring for damage.
• Check for vacuum leaks in the intake system.
• Replace the MAP sensor if faulty.
• Repair any vacuum leaks found.
• Clean or replace the throttle body if necessary.
• OBD-II scanner
• Multimeter
• Vacuum leak tester
$100 - $300
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly inspect and clean the throttle body.
• Ensure all vacuum hoses are in good condition.
• Perform regular maintenance checks on sensors.
Sensor Issue
• Do not ignore the Check Engine Light.
• Seek professional diagnosis if unsure.
• Avoid driving aggressively until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on sensors.
This code is commonly associated with BMW vehicles, particularly in models with turbocharged engines.
Moderate – Address the issue soon to prevent further engine performance problems.
Driving with a faulty MAP sensor can lead to increased emissions and reduced fuel efficiency.
• Engine at operating temperature
• Idle and light throttle conditions
The MAP sensor is typically located on the intake manifold.
Q: Can I drive with a P112F code?
A: It's not recommended to drive for extended periods with this code, as it can lead to poor engine performance.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspection of the intake system and sensors can help prevent this code.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
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.