P112F BMW Explained: Symptoms, Causes, and Solutions

When it comes to diagnosing and resolving issues with BMW vehicles, one troublesome code that frequently arises is P112F. This fault code pertains to the “Manifold Absolute Pressure To Throttle Angle Too High Bank 1“. Understanding its symptoms, potential causes, and possible solutions is crucial for effective troubleshooting.

Let’s dive into the details and equip ourselves with the knowledge needed to address the P112F code in BMW vehicles.

P112F BMW: A Quick Overview

Look at the summary for the BMW P112F code below!

Definition: Manifold Absolute Pressure To Throttle Angle Too High Bank 1
Severity: Medium
DIY Skill Level: Intermediate
Continue To Drive?: No
Estimated Repair Cost: $50 – $500

What Does The P112F BMW Code Mean?

The P112F BMW is a diagnostic trouble code (DTC) that indicates a problem with the manifold absolute pressure (MAP) sensor. The MAP sensor is used to monitor engine load by sampling the depression in the inlet manifold. When the throttle valve is opened, the inlet manifold pressure decreases. The MAP sensor sends a signal to the Digital Motor Electronics (DME), which uses this signal to calculate the amount of fuel to inject into the engine.

When the P112F code gets triggered in a BMW, it signifies an inconsistency between the indicated intake manifold pressure and the calculated mass airflow, a value derived from the throttle-valve angle. In simpler terms, there is a discrepancy between the expected engine load and the actual measured values.

Here are some of the BMW models (but not limited to) usually have the P112F code: 3 Series (E90, E92, E93), 5 Series (F10, F11, N55), 7 Series (F01, F02), X3 (E83, F25), X5 (E70, F15), X6 (E71, F16).

There are a few accompanying codes that can go along with the P112F code in BMWs. These codes include: 28A0, 2D2E, P0300, P0171, P0172, etc.

How Severe Is The P1449 Code In BMW?

The P112F BMW DTC is considered a moderate severity code. This means that it can cause drivability problems, but it is not likely to cause any major damage to the engine in the short term.

However, it is still not advisable to continue driving with the P112F code. Driving with this code could eventually harm the engine. If you have the P112F code in your BMW, it is best to have it diagnosed and repaired as soon as possible. The mechanic will be able to determine the cause of the code and recommend the necessary repairs.

What Are The Signs Of The P1449 BMW Code?

Several symptoms may manifest when encountering the P112F code in a BMW vehicle. Common symptoms include:

Check Engine Light (CEL)/Malfunction Indicator Lamp (MIL) illuminated
Reduced engine power or loss of acceleration
Rough idle or stalling
Poor fuel efficiency
Engine misfires or hesitation
Shaking or shuddering

What Causes The P1449 Code in BMW Vehicles?

The P112F code in BMW vehicles can have various underlying causes, including:

Wiring or electrical connection problems
Intake manifold leaks or vacuum hose issues
Malfunctioning MAP sensor
Faulty throttle valve or throttle position sensor
DME requires updates or goes defective

How to Fix And Diagnose The P112F BMW Code?

In this section, we will discuss the essential tools and parts required for the fixes. I will also provide a step-by-step guide to diagnose and repair the P112F BMW code and the rough estimates for the main repair tasks involved.

Essential Tools And Parts

In order to effectively identify and clear the C1109 code in Nissan vehicle, you will require the subsequent tools and components:

Step-by-Step Procedure

1. Retrieve fault codes

Connect a diagnostic scan tool to the vehicle’s OBD-II port and retrieve any additional accompanying fault codes.

2. Inspect wiring and connectors

Inspect the wiring harness and connectors associated with the intake pipe vacuum sensor and throttle body for any signs of damage, corrosion, or loose connections.
Repair if necessary

3. Check for vacuum leaks

Check the fuel vapor lines for vacuum leaks.
Look for cracked or disconnected hoses, loose fittings, or damaged connectors.
Fix it if the problem is detected.

4. Test the MAP sensor and throttle position sensor

Use the multimeter to test the MAP sensor and throttle position sensor.
The sensor readings should be within the specified range.
If the sensor readings are not within the specified range, then replace the faulty sensor.

5. Replace the intake manifold gasket

If the sensors are within the specified range, then replace the intake manifold gasket.

6. Clear the code and test drive

After fixing the issues, use the OBD-II scanner to clear the BMW P112F code and other trouble codes.
Then, take the car for a test drive to check if it’s working properly again.

The most common cause for this code is likely a vacuum leak. This video might be helpful for you.

DIY Repair Level And Estimated Costs

Diagnosing and repairing code P112F BMW requires intermediate to advanced automotive repair knowledge and experience. While some steps, such as fixing the wiring issue or vacuum leak repair, can be done by DIY enthusiasts, other tasks may require professional assistance.

The estimated cost of repairs can vary depending on the specific vehicle model, labor rates, and the need for replacement parts. Here is a table listing estimated costs:

Repair Task	Estimated Cost
Wiring repair or replacement	$100 to $300
Vacuum leak detection and repair	$50 to $200
MAP sensor replacement	$100 to $300
Throttle position sensor replacement	$100 to $300
Intake manifold gasket replacement	$200 to $500

It is important to note that these costs are approximate and may vary significantly based on various factors, including location and dealership or independent repair shop rates. If unsure or uncomfortable with the repair process, it is recommended to seek the assistance of a qualified mechanic or automotive professional.

Final Thoughts

Ready to tackle the P112F code in your BMW? Armed with the knowledge you’ve gained, you can confidently diagnose and resolve this issue. Don’t keep this valuable information to yourself – share it with fellow BMW enthusiasts who may be facing similar challenges.

If you have any questions or success stories, we’re here to listen in the comments section below. Keep your BMW running smoothly and stay tuned for more expert automotive guides. Drive with confidence!

If you’re interested in exploring the BMW code list or other car brand OBD2 code lists, check out our OBD2 code list generator.

Reference Sources

Professional Auto Repair, What Is Engine Misfiring? Professional Auto Repair Blog

Delphi Auto Parts, Making Sense of Your Sensors: MAP Sensor. Delphi Auto Parts Resource Center