BMW P1187 Code:O2 Sensor Heater Control Circuit Bank 2 Sensor 2
As a car owner, it’s essential to be aware of the various engine codes that may appear on your vehicle’s dashboard. One such code is the BMW P1187 code, which can indicate a problem with the O2 sensor heater control circuit in bank 2 sensor 2. If you’re experiencing this issue, it’s crucial to understand its meaning, potential causes, symptoms, and fixes. In this article, we’ll provide you with expert advice on how to diagnose and repair the BMW P1187 code to ensure your vehicle runs smoothly.
What Does the BMW P1187 Code Mean?
The BMW P1187 code refers to a problem with the O2 sensor heater control circuit in bank 2 sensor 2 of the vehicle. This sensor is responsible for monitoring the oxygen levels in the exhaust system and sending signals to the engine control module to adjust the air/fuel ratio. When the O2 sensor heater control circuit malfunctions, it can cause the sensor to fail, leading to poor engine performance, reduced fuel efficiency, and increased emissions. The P1187 code is typically triggered by a faulty sensor, damaged wiring, or a failed heater circuit. It is important to address this issue promptly to prevent further damage to the vehicle and ensure optimal engine performance.
Signs and Symptoms of BMW P1187 Code
The BMW P1187 code is related to the O2 sensor heater control circuit in bank 2 sensor 2. This code indicates that there is a problem with the O2 sensor heater circuit, which can cause a variety of symptoms in your BMW. Here are some of the signs and symptoms that you may experience if your BMW has a P1187 code:
- Check Engine Light: The most common symptom of the P1187 code is the illumination of the check engine light on your BMW’s dashboard. This light may come on and stay on, or it may flash intermittently.
- Poor Fuel Economy: If your BMW’s O2 sensor is not functioning properly, it may not be able to accurately measure the amount of oxygen in the exhaust gases. This can cause your engine to run rich, which can lead to poor fuel economy.
- Engine Misfires: A faulty O2 sensor can also cause your engine to misfire or run rough. This is because the engine may not be receiving the correct amount of fuel or air, which can cause it to run poorly.
- Reduced Engine Performance: If your BMW’s O2 sensor is not working properly, it may not be able to provide the engine with the correct information it needs to operate at peak performance. This can cause a reduction in engine power and acceleration.
- Failed Emissions Test: A faulty O2 sensor can also cause your BMW to fail an emissions test. This is because the sensor is responsible for measuring the amount of oxygen in the exhaust gases, which is a key component of emissions testing.
If you are experiencing any of these symptoms in your BMW, it is important to have your vehicle diagnosed and repaired as soon as possible. Ignoring the P1187 code can lead to further damage to your engine and other components, which can be costly to repair. A qualified mechanic can diagnose the issue and provide you with the necessary repairs to get your BMW back on the road in top condition.
Possible Causes of BMW P1187 Code
The BMW P1187 code is related to the O2 sensor heater control circuit in bank 2 sensor 2. This code indicates that there is a problem with the O2 sensor heater circuit, which is responsible for heating up the sensor to ensure accurate readings. Here are some of the possible causes of the BMW P1187 code:
- Faulty O2 sensor: The most common cause of the P1187 code is a faulty O2 sensor. Over time, the sensor can become contaminated or damaged, which can cause it to malfunction. A faulty O2 sensor can also cause other issues, such as poor fuel economy and increased emissions.
- Wiring issues: Another possible cause of the P1187 code is wiring issues in the O2 sensor heater circuit. This can include damaged or corroded wires, loose connections, or a blown fuse. These issues can prevent the sensor from receiving the power it needs to function properly.
- Faulty PCM: The powertrain control module (PCM) is responsible for controlling the O2 sensor heater circuit. If the PCM is faulty, it may not be able to send the proper signals to the sensor, which can cause the P1187 code to appear.
- Faulty relay: The O2 sensor heater circuit also relies on a relay to function properly. If the relay is faulty, it may not be able to send power to the sensor, which can cause the P1187 code to appear.
- Exhaust leaks: Finally, exhaust leaks can also cause the P1187 code to appear. If there is a leak in the exhaust system, it can cause the O2 sensor to malfunction, which can trigger the code.
If you are experiencing the P1187 code in your BMW, it is important to have it diagnosed and repaired as soon as possible. Ignoring the issue can lead to further damage to your vehicle and can also cause it to fail emissions tests. A qualified mechanic can help you determine the root cause of the problem and recommend the best course of action to fix it.
Fixes for BMW P1187 Code
The BMW P1187 code indicates a problem with the O2 sensor heater control circuit in bank 2 sensor 2. This can cause issues with the vehicle’s emissions and performance. Here are some possible fixes for this code:
1. Replace the O2 sensor
The most common fix for the P1187 code is to replace the faulty O2 sensor. This sensor is responsible for measuring the amount of oxygen in the exhaust and sending that information to the engine control module. A faulty sensor can cause the engine to run rich or lean, which can lead to poor performance and increased emissions.
2. Check the wiring and connections
If the O2 sensor is not the problem, the next step is to check the wiring and connections in the heater control circuit. A damaged or corroded wire can cause the circuit to malfunction, which can trigger the P1187 code. Check for any visible damage or corrosion and repair or replace as necessary.
3. Replace the heater control circuit
If the wiring and connections are in good condition, the issue may be with the heater control circuit itself. This circuit is responsible for heating the O2 sensor to ensure accurate readings. A malfunctioning circuit can cause the sensor to fail, which can trigger the P1187 code. In this case, the circuit will need to be replaced.
4. Check the engine control module
In rare cases, the issue may be with the engine control module (ECM) itself. The ECM is responsible for receiving information from the O2 sensor and adjusting the fuel mixture accordingly. If the ECM is not functioning properly, it may not be able to receive accurate information from the sensor, which can trigger the P1187 code. If all other fixes have been attempted and the issue persists, the ECM may need to be replaced.
In conclusion, the BMW P1187 code can be caused by a variety of issues related to the O2 sensor heater control circuit. The most common fix is to replace the faulty sensor, but it’s important to check the wiring, connections, and heater control circuit before doing so. If all else fails, the engine control module may need to be replaced. It’s important to address this issue promptly to ensure proper vehicle performance and reduce emissions.
How Much Will It Take to Fix the BMW P1187 Code?
The cost of fixing the BMW P1187 code can vary depending on the severity of the issue and the type of repair needed. In general, the cost can range from $100 to $500 or more. If the problem is simply a faulty O2 sensor, the cost may be on the lower end of the spectrum. However, if the issue is related to the wiring or control circuit, the repair may be more complex and expensive.
It’s important to note that ignoring the P1187 code can lead to further damage to your vehicle and potentially more expensive repairs down the line. It’s best to address the issue as soon as possible to avoid any additional problems.
If you’re not comfortable diagnosing and repairing the issue yourself, it’s recommended to take your BMW to a certified mechanic or dealership. They can provide a more accurate estimate of the cost and ensure that the repair is done correctly.
Possible Causes and Fixes of Code P1187 in BMW Vehicles
| Possible Cause | Fix | Cost to Fix |
|---|---|---|
| Failed O2 sensor heater circuit | Replace faulty O2 sensor | $200-$500 |
| Wiring or connector issues in O2 sensor heater circuit | Repair or replace damaged wiring or connectors | $100-$300 |
| Failed PCM (Powertrain Control Module) | Replace faulty PCM | $500-$1000 |
| Failed fuse or relay in O2 sensor heater circuit | Replace faulty fuse or relay | $50-$100 |
Preventing the BMW P1187 Code
The BMW P1187 code is a common issue that can be prevented with proper maintenance and care. Here are some preventive measures that can help you avoid this problem:
- Regular Maintenance: Regular maintenance is essential to keep your BMW in good condition. Make sure to follow the manufacturer’s recommended maintenance schedule and have your vehicle serviced by a qualified mechanic.
- Replace Faulty O2 Sensors: The O2 sensors in your BMW play a crucial role in regulating the air-fuel mixture. If they are faulty, they can cause the P1187 code to appear. Make sure to replace any faulty O2 sensors as soon as possible.
- Use High-Quality Fuel: Using low-quality fuel can cause a buildup of carbon deposits in the engine, which can lead to the P1187 code. Make sure to use high-quality fuel that meets the manufacturer’s specifications.
- Check the Exhaust System: A damaged or clogged exhaust system can cause the P1187 code to appear. Make sure to have your exhaust system checked regularly and replace any damaged or clogged parts.
- Check the Wiring: Faulty wiring can cause the P1187 code to appear. Make sure to check the wiring for any damage or corrosion and replace any faulty wiring as soon as possible.
- Keep Your Engine Clean: A dirty engine can cause the P1187 code to appear. Make sure to keep your engine clean and free of debris and dirt.
By following these preventive measures, you can avoid the BMW P1187 code and keep your vehicle running smoothly. Remember to always have your vehicle serviced by a qualified mechanic and use high-quality parts and fuel. If you do experience the P1187 code, make sure to address the issue promptly to avoid further damage to your vehicle.
How Serious is the BMW P1187 Code?
The BMW P1187 code is a relatively serious issue that should not be ignored. This code indicates a problem with the O2 sensor heater control circuit in bank 2 sensor 2 of the vehicle. The O2 sensor is responsible for monitoring the amount of oxygen in the exhaust gases and sending this information to the engine control module (ECM). The ECM then uses this information to adjust the air/fuel mixture to ensure optimal engine performance and reduce emissions.
If the O2 sensor heater control circuit is not functioning properly, it can cause a number of issues. The engine may run poorly, with reduced power and acceleration. Fuel economy may also suffer, as the engine may be running too rich or too lean. In addition, the vehicle may fail an emissions test, as the O2 sensor is a critical component in reducing harmful emissions.
To fix the BMW P1187 code, it is important to diagnose the underlying issue and repair or replace any faulty components. This may involve replacing the O2 sensor, repairing wiring or connectors, or replacing the ECM. It is important to address this issue promptly to avoid further damage to the vehicle and ensure optimal performance and fuel economy.
Can You Still Drive with the BMW P1187 Code?
If your BMW is showing the P1187 code, it means that there is an issue with the O2 sensor heater control circuit in bank 2 sensor 2. This can cause a variety of symptoms, including poor fuel economy, reduced engine performance, and increased emissions. However, the good news is that you can still drive your vehicle with this code.
While it is not recommended to ignore the issue and continue driving without addressing it, you can still safely operate your BMW with the P1187 code. However, it is important to note that the longer you drive with this code, the more damage it can cause to your vehicle’s engine and emissions system.
If you are experiencing symptoms related to the P1187 code, it is recommended to have your vehicle inspected by a qualified mechanic as soon as possible. They can diagnose the issue and provide you with the necessary repairs to get your BMW back to optimal performance.
Conclusion
If you are experiencing the BMW P1187 code, it is important to address the issue promptly to avoid further damage to your vehicle. The code indicates a problem with the O2 sensor heater control circuit in bank 2 sensor 2. The causes of this issue can range from a faulty sensor to a damaged wiring harness. Symptoms may include decreased fuel efficiency and rough idling. To fix the problem, it is recommended to have a professional mechanic diagnose and repair the issue. With the right expertise and tools, your BMW can be back on the road in no time.
FAQ
What does the BMW P1187 code mean?
The BMW P1187 code refers to a problem with the O2 sensor heater control circuit in bank 2 sensor 2 of the vehicle.
What are the symptoms of the BMW P1187 code?
The symptoms of the BMW P1187 code may include poor fuel economy, rough idling, and a decrease in engine performance.
What are the causes of the BMW P1187 code?
The causes of the BMW P1187 code may include a faulty O2 sensor, damaged wiring or connectors, or a malfunctioning PCM.
How do I diagnose the BMW P1187 code?
Diagnosing the BMW P1187 code requires the use of an OBD-II scanner to read the code and determine the underlying issue. A mechanic may also perform a visual inspection of the O2 sensor and related components.
Can I still drive my BMW with the P1187 code?
It is not recommended to drive your BMW with the P1187 code as it can lead to further damage to the vehicle and potentially cause safety issues.
How do I fix the BMW P1187 code?
The fix for the BMW P1187 code may involve replacing the faulty O2 sensor, repairing damaged wiring or connectors, or replacing the PCM if necessary.
Can I fix the BMW P1187 code myself?
While it is possible to fix the BMW P1187 code yourself, it is recommended to seek the assistance of a professional mechanic to ensure proper diagnosis and repair of the issue.
Learn about other similar BMW Fault Codes from our BMW OBD 2 Fault Code List.