BMW P0112 Code : Intake Air Temperature Sensor 1 Circuit Low Bank 1
As a car owner, it can be frustrating to see a warning light pop up on your dashboard. One of the most common issues that BMW drivers may encounter is the P0112 code. This diagnostic trouble code is related to the intake air temperature sensor circuit, specifically for Bank 1. If you’re experiencing this issue, it’s important to understand what it means, what symptoms may be associated with it, and how to diagnose and fix the problem. In this article, we’ll explore the meaning, causes, symptoms, and fixes for the BMW P0112 code, so you can troubleshoot and resolve the issue with your vehicle.
BMW P0112 Code: Intake Air Temperature Sensor 1 Circuit Low Bank 1
The BMW P0112 code is a diagnostic trouble code (DTC) that indicates an issue with the intake air temperature sensor 1 circuit on bank 1 of the engine. This sensor is responsible for measuring the temperature of the air entering the engine, which is used by the engine control module (ECM) to adjust fuel delivery and ignition timing. When the ECM detects a low voltage signal from the intake air temperature sensor 1 circuit, it will trigger the P0112 code and illuminate the check engine light.
Signs and Symptoms of BMW P0112 Code
When the BMW P0112 code appears, it indicates that there is a problem with the Intake Air Temperature Sensor 1 Circuit Low Bank 1. This can cause a variety of symptoms that can affect the performance and drivability of your BMW vehicle. Here are some of the most common signs and symptoms of the BMW P0112 code:
- Check Engine Light – The most obvious symptom of the P0112 code is the illumination of the check engine light on your BMW’s dashboard. This is the first indication that there is a problem with your vehicle’s intake air temperature sensor.
- Poor Fuel Economy – A faulty intake air temperature sensor can cause your BMW to consume more fuel than usual. This can result in poor fuel economy and increased costs at the gas pump.
- Engine Stalling – If the intake air temperature sensor is not functioning properly, it can cause your BMW’s engine to stall or hesitate during acceleration. This can be dangerous, especially if you are driving at high speeds.
- Reduced Power and Performance – A malfunctioning intake air temperature sensor can also cause your BMW to experience reduced power and performance. This can make it difficult to accelerate or maintain speed on the highway.
- Difficulty Starting – In some cases, a faulty intake air temperature sensor can make it difficult to start your BMW’s engine. This can be frustrating and may require multiple attempts to get the engine running.
- Increased Emissions – A malfunctioning intake air temperature sensor can also cause your BMW to produce higher levels of emissions. This can result in your vehicle failing an emissions test or being flagged for environmental violations.
If you are experiencing any of these symptoms, it is important to have your BMW vehicle diagnosed and repaired as soon as possible. Ignoring the P0112 code can lead to further damage to your vehicle and potentially more expensive repairs down the line. Contact a qualified BMW mechanic or dealership to schedule a diagnostic appointment and get your vehicle back on the road.
Possible Causes of BMW P0112 Code
The P0112 code is a diagnostic trouble code (DTC) that is associated with BMW vehicles. It indicates that there is a problem with the Intake Air Temperature Sensor 1 Circuit Low Bank 1. There are several possible causes of this code, including:
- Faulty Intake Air Temperature Sensor: The most common cause of the P0112 code is a faulty intake air temperature sensor. This sensor is responsible for measuring the temperature of the air entering the engine and sending that information to the engine control module (ECM). If the sensor is faulty, it may send incorrect information to the ECM, which can cause the code to be triggered.
- Wiring Issues: Another possible cause of the P0112 code is wiring issues. If there is a problem with the wiring that connects the intake air temperature sensor to the ECM, it can cause the sensor to malfunction and trigger the code.
- Failed ECM: In rare cases, a failed ECM can cause the P0112 code to be triggered. If the ECM is not receiving the correct information from the intake air temperature sensor, it may not be able to properly control the engine’s performance.
- Failed Coolant Temperature Sensor: The coolant temperature sensor is another sensor that is responsible for sending information to the ECM. If this sensor fails, it can cause the ECM to receive incorrect information, which can trigger the P0112 code.
- Failed Mass Airflow Sensor: The mass airflow sensor is another sensor that is responsible for measuring the amount of air entering the engine. If this sensor fails, it can cause the ECM to receive incorrect information, which can trigger the P0112 code.
- Failed Throttle Position Sensor: The throttle position sensor is responsible for measuring the position of the throttle and sending that information to the ECM. If this sensor fails, it can cause the ECM to receive incorrect information, which can trigger the P0112 code.
- Failed Engine Coolant Temperature Sensor: The engine coolant temperature sensor is responsible for measuring the temperature of the engine coolant and sending that information to the ECM. If this fails, it can cause this error.
Fixes for BMW P0112 Code
If you’re experiencing the P0112 code on your BMW, it’s important to diagnose and fix the issue as soon as possible to prevent further damage to your vehicle. Here are some potential fixes for the P0112 code:
- Replace the Intake Air Temperature Sensor: The most common cause of the P0112 code is a faulty intake air temperature (IAT) sensor. This sensor measures the temperature of the air entering the engine and sends that information to the engine control module (ECM). If the sensor is malfunctioning, it can cause the ECM to think that the air entering the engine is colder than it actually is, which can lead to a variety of issues. Replacing the IAT sensor should resolve the P0112 code in most cases.
- Replace the Coolant Temperature Sensor: In some cases, the P0112 code may be caused by a faulty coolant temperature sensor. This sensor measures the temperature of the engine coolant and sends that information to the ECM. If the sensor is malfunctioning, it can cause the ECM to think that the engine is colder than it actually is, which can lead to a variety of issues. Replacing the coolant temperature sensor may resolve the P0112 code in some cases.
- Repair or Replace Wiring Harness: If the IAT or coolant temperature sensor is functioning properly, the P0112 code may be caused by a damaged wiring harness. The wiring harness connects the sensors to the ECM, and if it’s damaged or corroded, it can cause issues with the sensor readings. Repairing or replacing the wiring harness should resolve the P0112 code in this case.
- Clean or Replace Air Filter: A dirty or clogged air filter can also cause issues with the IAT sensor readings, which can lead to the P0112 code. Cleaning or replacing the air filter may resolve the issue in some cases.
- Check for Vacuum Leaks: Vacuum leaks can also cause issues with the IAT sensor readings, which can lead to the P0112 code. Checking for and repairing any vacuum leaks may resolve the issue in some cases.
How Much Will It Take to Fix BMW P0112 Code?
The cost of fixing the BMW P0112 code can vary depending on the root cause of the issue. If the problem is a faulty intake air temperature sensor, the cost of replacement can range from $50 to $200, depending on the make and model of the vehicle. However, if the issue is related to a damaged wiring harness or a malfunctioning engine control module, the cost of repair can be significantly higher.
It is important to note that the cost of fixing the P0112 code is not just limited to the cost of parts and labor. Additional expenses may include diagnostic fees, which can range from $50 to $150, and the cost of renting a vehicle while the repairs are being made. Therefore, it is recommended to get a detailed estimate from a trusted mechanic before proceeding with any repairs.
Overall, the cost of fixing the BMW P0112 code can range from a few hundred dollars to over a thousand dollars, depending on the severity of the issue and the cost of replacement parts. It is important to address the issue promptly to avoid further damage to the vehicle and ensure optimal performance.
Possible Causes and Fixes of Code P0112 for BMW Vehicles
Possible Cause Fix Cost to Fix Failed Intake Air Temperature Sensor Replace the sensor $50-$150 Wiring or Connection Issues Repair or replace damaged wiring or connections $100-$300 Failed Engine Coolant Temperature Sensor Replace the sensor $50-$150 Failed Engine Control Module (ECM) Replace the ECM $500-$1000 Preventing BMW P0112 Code
If you own a BMW vehicle, it’s important to take preventive measures to avoid the P0112 code. Here are some tips to help you prevent this issue:
- Regular Maintenance: One of the best ways to prevent the P0112 code is to keep up with your vehicle’s regular maintenance. This includes changing the air filter, oil filter, and spark plugs as recommended by the manufacturer.
- Check Engine Light: If your check engine light comes on, don’t ignore it. Take your vehicle to a mechanic to have it diagnosed and repaired as soon as possible.
- Coolant System: Make sure your vehicle’s coolant system is working properly. Check the coolant level regularly and replace any damaged or worn parts, such as the coolant temperature sensor or thermostat.
- Wiring Harness: Inspect your vehicle’s wiring harness for any signs of damage or wear. Replace any damaged wires or connectors to prevent electrical issues that could trigger the P0112 code.
- Driving Habits: Avoid driving your BMW vehicle aggressively or in extreme weather conditions. This can put extra strain on the engine and other components, increasing the risk of issues like the P0112 code.
By following these preventive measures, you can reduce the risk of the P0112 code and other issues with your BMW vehicle. Regular maintenance and inspections can help you catch problems early and prevent them from becoming more serious and costly to repair. If you do experience the P0112 code or other issues, don’t hesitate to take your vehicle to a qualified mechanic for diagnosis and repair.
How Serious is the BMW P0112 Code?
The BMW P0112 code is a relatively serious issue that should not be ignored. This code indicates that there is a problem with the intake air temperature sensor circuit on bank 1 of the engine. The intake air temperature sensor is responsible for measuring the temperature of the air entering the engine, which is used by the engine control module (ECM) to adjust the air/fuel mixture and ignition timing.
If the intake air temperature sensor is not functioning properly, it can cause a variety of issues with the engine’s performance and fuel efficiency. In some cases, the engine may run poorly or even stall. Additionally, the ECM may enter a “limp mode” to protect the engine from damage, which can limit the vehicle’s performance and speed.
Overall, it is important to address the BMW P0112 code as soon as possible to prevent further damage to the engine and ensure that the vehicle is running at peak performance.
Can You Still Drive with the BMW P0112 Code?
If your BMW is displaying the P0112 code, it is not recommended to continue driving the vehicle until the issue has been resolved. This code indicates a problem with the intake air temperature sensor circuit, which can affect the engine’s performance and potentially cause further damage if left untreated.
Driving with the P0112 code may result in reduced fuel efficiency, decreased power, and rough idling. In some cases, the engine may even stall or fail to start altogether. Additionally, ignoring the code can lead to more severe issues with the engine and other components, resulting in costly repairs.
If you are experiencing the symptoms associated with the P0112 code, it is best to have your BMW inspected by a qualified mechanic as soon as possible. They can diagnose the issue and recommend the appropriate repairs to get your vehicle back to optimal performance.
Conclusion
If you are experiencing the P0112 code on your BMW vehicle, it is important to address the issue promptly to avoid further damage and potential safety hazards. By understanding the meaning, causes, symptoms, and fixes associated with this code, you can troubleshoot and resolve the issue effectively. Whether it involves replacing a faulty sensor or repairing a damaged wiring harness, taking action to resolve the P0112 code can help ensure the continued performance and reliability of your BMW vehicle.
FAQ
What is the BMW P0112 code?
The BMW P0112 code is a diagnostic trouble code that indicates an issue with the Intake Air Temperature Sensor 1 Circuit Low Bank 1.
What are the symptoms of the BMW P0112 code?
The symptoms of the BMW P0112 code may include poor engine performance, decreased fuel efficiency, and an illuminated check engine light.
What are the common causes of the BMW P0112 code?
The common causes of the BMW P0112 code may include a faulty coolant temperature sensor, a damaged wiring harness, or a malfunctioning intake air temperature sensor.
How is the BMW P0112 code diagnosed?
The BMW P0112 code can be diagnosed using an OBD-II scanner, which will read the code and provide information on the specific issue. A mechanic may also perform a visual inspection of the wiring and sensors to identify any visible damage or issues.
Can I still drive my BMW with the P0112 code?
It is not recommended to drive your BMW with the P0112 code, as it can lead to further damage to the engine and decreased fuel efficiency.
How is the BMW P0112 code fixed?
The BMW P0112 code can be fixed by replacing the faulty sensor or repairing any damaged wiring or connections. A mechanic may also need to reset the code using an OBD-II scanner.
How much does it cost to fix the BMW P0112 code?
The cost to fix the BMW P0112 code will vary depending on the specific issue and the cost of parts and labor. It is recommended to get a quote from a trusted mechanic before proceeding with any repairs.
Learn about other similar BMW Fault Codes from our BMW OBD 2 Fault Code List.