BMW P0687 Code:Engine Control Module Power Relay Control Circuit High
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 face is the P0687 code. This fault code can indicate a problem with the engine control module power relay control circuit, which can lead to a variety of symptoms and potential causes. In this article, we will explore the meaning, causes, symptoms, and fixes for the BMW P0687 code. Whether you are a DIY mechanic or seeking professional advice, we have got you covered.
What Does the BMW P0687 Code Mean?
The BMW P0687 code refers to a fault in the engine control module power relay control circuit, indicating that there is a high voltage reading in the circuit. This can cause a range of issues with the vehicle’s performance, including reduced power, poor fuel efficiency, and difficulty starting the engine. The code is typically triggered by a malfunction in the power relay or a wiring issue in the control circuit. It is important to address the P0687 code promptly to prevent further damage to the vehicle and ensure optimal performance.
Signs and Symptoms of BMW P0687 Code
The P0687 code is a fault code that is specific to BMW vehicles. It is related to the engine control module power relay control circuit high. When this code is triggered, it can cause a variety of symptoms that can affect the performance and drivability of your BMW. Here are some of the signs and symptoms of the BMW P0687 code:
- Check Engine Light: The most common symptom of the P0687 code is the illumination of the check engine light on your BMW’s dashboard. This light is designed to alert you to any issues with your vehicle’s systems, including the engine control module power relay control circuit high.
- Engine Stalling: Another symptom of the P0687 code is engine stalling. This can occur when the engine control module power relay control circuit high is not functioning properly, causing the engine to shut down unexpectedly.
- Engine Misfire: The P0687 code can also cause engine misfires, which can result in a rough idle, poor acceleration, and decreased fuel efficiency.
- Reduced Power: When the P0687 code is triggered, it can cause a reduction in power to the engine, which can make it difficult to accelerate or maintain speed.
- Difficulty Starting: If the engine control module power relay control circuit high is not functioning properly, it can also make it difficult to start your BMW. This can be especially noticeable in cold weather or after the vehicle has been sitting for an extended period of time.
If you are experiencing any of these symptoms in your BMW, it is important to have the vehicle diagnosed by a qualified mechanic as soon as possible. Ignoring the P0687 code can lead to further damage to your vehicle’s systems and potentially costly repairs. A mechanic can use diagnostic tools to identify the cause of the code and recommend the appropriate repairs to fix the issue.
Possible Causes of BMW P0687 Code
The P0687 code is a fault code that is specific to BMW vehicles. It indicates a problem with the engine control module power relay control circuit, which can cause a range of issues with the vehicle’s performance. There are several possible causes of the P0687 code, including:
- Faulty power relay: A faulty power relay is one of the most common causes of the P0687 code. The power relay is responsible for controlling the flow of electricity to the engine control module, and if it fails, it can cause the circuit to become high, triggering the code.
- Wiring issues: Wiring issues can also cause the P0687 code to appear. If there is a problem with the wiring that connects the power relay to the engine control module, it can cause the circuit to become high and trigger the code.
- Failed engine control module: In some cases, a failed engine control module can be the cause of the P0687 code. If the module is not functioning properly, it may not be able to control the power relay circuit, causing the code to appear.
- Low battery voltage: Low battery voltage can also trigger the P0687 code. If the battery voltage is too low, it can cause the power relay circuit to become high, triggering the code.
- Corroded or damaged connectors: Corroded or damaged connectors can also cause the P0687 code to appear. If the connectors that connect the power relay to the engine control module are corroded or damaged, it can cause the circuit to become high and trigger the code.
- Failed alternator: A failed alternator can also cause the P0687 code to appear. If the alternator is not functioning properly, it may not be able to provide enough power to the battery, causing the voltage to drop and triggering the code.
In conclusion, the P0687 code can be caused by a range of issues, including a faulty power relay, wiring issues, a failed engine control module, low battery voltage, corroded or damaged connectors, and a failed alternator.
Fixes for BMW P0687 Code
The P0687 code in BMW vehicles indicates a problem with the engine control module power relay control circuit. If you are experiencing this issue, there are several fixes that you can try to resolve the problem. Here are some of the most common solutions:
- Check the power relay: The first step in fixing the P0687 code is to check the power relay. This component is responsible for supplying power to the engine control module, and if it is faulty, it can trigger the code. You can test the relay using a multimeter or replace it if necessary.
- Inspect the wiring and connectors: Faulty wiring or connectors can also cause the P0687 code to appear. Check the wiring and connectors for any signs of damage or corrosion, and repair or replace them as needed.
- Replace the engine control module: If the power relay and wiring are in good condition, the problem may be with the engine control module itself. In this case, you may need to replace the module to fix the issue.
- Reset the code: Once you have fixed the underlying problem, you will need to reset the code using a diagnostic tool. This will clear the code from the system and ensure that it does not reappear.
- Seek professional help: If you are not comfortable performing these fixes yourself, or if the problem persists after attempting these solutions, it is best to seek professional help. A qualified mechanic or BMW specialist can diagnose and repair the issue for you.
In conclusion, the BMW P0687 code can be caused by a variety of issues, including a faulty power relay, damaged wiring or connectors, or a malfunctioning engine control module. By checking these components and performing the necessary repairs or replacements, you can fix the problem and clear the code from your vehicle’s system. If you are unsure how to proceed, it is always best to seek professional help to ensure that the issue is resolved correctly.
How Much Will It Take to Fix the BMW P0687 Code?
The cost of fixing the BMW P0687 code can vary depending on the root cause of the issue. In some cases, it may be a simple fix that can be done at home with basic tools and knowledge. However, in other cases, it may require professional diagnostic services and repairs.
If the issue is related to a faulty engine control module power relay, the cost of replacement can range from $50 to $200. However, if the issue is related to a damaged wiring harness or other electrical components, the cost can be significantly higher.
It’s important to note that ignoring the P0687 code can lead to further damage to your BMW’s engine and electrical system. This can result in even higher repair costs down the line. It’s best to address the issue as soon as possible to avoid any additional damage.
If you’re unsure of how to fix the P0687 code or don’t have the necessary tools and expertise, it’s recommended to seek professional help. A certified BMW mechanic can diagnose the issue and provide an accurate estimate for repairs.
Possible Causes and Fixes of Code
| Possible Cause | Fix | Cost to Fix |
|---|---|---|
| Faulty Engine Control Module Power Relay | Replace Engine Control Module Power Relay | $100-$300 |
| Corroded or Loose Wiring Connections | Clean or Tighten Wiring Connections | $50-$100 |
| Failed Engine Control Module | Replace Engine Control Module | $500-$1000 |
| Malfunctioning Powertrain Control Module | Replace Powertrain Control Module | $500-$1000 |
Preventing the BMW P0687 Code
The BMW P0687 code is a fault code that indicates a problem with the engine control module power relay control circuit. This code can be triggered by a variety of issues, including a faulty relay, damaged wiring, or a malfunctioning engine control module. To prevent this code from occurring, there are several preventive measures that you can take.
1. Regular Maintenance: One of the most important preventive measures is to ensure that your BMW is regularly maintained. This includes regular oil changes, tune-ups, and inspections. Regular maintenance can help prevent issues that can trigger the P0687 code.
2. Check the Battery: Another important preventive measure is to check the battery regularly. A weak or dead battery can cause voltage fluctuations that can trigger the P0687 code. Make sure that your battery is in good condition and that the terminals are clean and tight.
3. Check the Wiring: The wiring that connects the engine control module to the power relay can become damaged over time. Check the wiring regularly for signs of wear or damage. If you notice any issues, have them repaired immediately to prevent the P0687 code from occurring.
4. Check the Relay: The power relay is responsible for controlling the power to the engine control module. If the relay is faulty, it can cause the P0687 code to be triggered. Check the relay regularly for signs of wear or damage. If you notice any issues, have the relay replaced immediately.
5. Use Quality Parts: When replacing parts on your BMW, make sure to use quality parts that are designed for your specific make and model. Using inferior parts can cause issues that can trigger the P0687 code.
How Serious is the BMW P0687 Code?
The BMW P0687 code is a serious issue that should not be ignored. This code indicates a problem with the engine control module power relay control circuit, which can cause a range of issues with your BMW’s performance and safety. When this code is triggered, it means that the power relay control circuit is experiencing high voltage, which can lead to a variety of problems.
Some of the symptoms of the BMW P0687 code include engine misfires, reduced power, and poor fuel economy. In some cases, the engine may not start at all. If left untreated, this code can cause damage to other components of your BMW’s engine, leading to more expensive repairs down the line.
It is important to address the BMW P0687 code as soon as possible to prevent further damage to your vehicle. A qualified mechanic can diagnose the issue and recommend the appropriate repairs to fix the problem. Ignoring this code can lead to more serious issues and potentially put your safety at risk while driving your BMW.
Can You Still Drive with the BMW P0687 Code?
If your BMW has triggered the P0687 code, it is not recommended to continue driving the vehicle until the issue has been resolved. This code indicates a problem with the engine control module power relay control circuit, which can cause a range of issues with the vehicle’s performance and safety.
Driving with the P0687 code can lead to a variety of symptoms, including engine misfires, reduced power, and even stalling. These issues can be dangerous, especially if they occur while driving at high speeds or in heavy traffic.
To avoid further damage to your BMW and ensure your safety on the road, it is best to have the issue diagnosed and repaired as soon as possible. A qualified mechanic or BMW specialist can use diagnostic tools to identify the root cause of the P0687 code and recommend the necessary repairs.
Ignoring the P0687 code can lead to more serious and costly issues down the line, so it is important to address the problem promptly and avoid driving the vehicle until it has been fixed.
Conclusion
In conclusion, the BMW P0687 code is a specific fault code that can be triggered in BMW vehicles. It indicates an issue with the engine control module power relay control circuit being too high. This can cause a range of symptoms, including engine misfires, reduced power, and even stalling. The causes of the code can vary, from a faulty relay to wiring issues or a malfunctioning engine control module. However, with the right diagnostic tools and expert advice, it is possible to identify and fix the issue. If you are experiencing the BMW P0687 code, it is important to seek professional help to ensure your vehicle is running safely and efficiently.
FAQ
What does the BMW P0687 code mean?
The BMW P0687 code refers to a fault in the engine control module power relay control circuit, indicating that there is a high voltage reading in the circuit.
What are the common causes of the BMW P0687 code?
The common causes of the BMW P0687 code include a faulty power relay, damaged wiring or connectors in the power relay circuit, or a malfunctioning engine control module.
What are the symptoms of the BMW P0687 code?
The symptoms of the BMW P0687 code may include engine stalling or failure to start, reduced engine performance, and illuminated warning lights on the dashboard.
Can I still drive my BMW with the P0687 code?
It is not recommended to drive your BMW with the P0687 code as it can cause further damage to the engine and other components. It is best to have the issue diagnosed and repaired as soon as possible.
How is the BMW P0687 code diagnosed?
The BMW P0687 code can be diagnosed using a diagnostic scanner that can read fault codes from the engine control module. A technician may also perform a visual inspection of the power relay circuit and wiring to identify any visible damage or issues.
What are the possible fixes for the BMW P0687 code?
The possible fixes for the BMW P0687 code include replacing the power relay, repairing or replacing damaged wiring or connectors in the power relay circuit, or replacing the engine control module if it is found to be faulty.
Can I fix the BMW P0687 code myself?
It is not recommended to attempt to fix the BMW P0687 code yourself unless you have the necessary knowledge and experience to do so. It is best to have the issue diagnosed and repaired by a qualified technician to ensure proper repairs and prevent further damage to your BMW.
Learn about other similar BMW Fault Codes from our BMW OBD 2 Fault Code List.