BMW P0117 Code : Engine Coolant Temperature Sensor 1 Circuit Low
As a car owner, it’s important to be aware of any warning signs or error codes that may appear on your vehicle’s dashboard. One such code that BMW drivers may encounter is the P0117 code, which indicates a problem with the engine coolant temperature sensor. In this article, we will explore the meaning, causes, symptoms, and fixes for the BMW P0117 code. By understanding this code and its implications, you can take the necessary steps to ensure the proper functioning of your BMW vehicle.
What Does the BMW P0117 Code Mean?
The BMW P0117 code indicates a problem with the engine coolant temperature sensor 1 circuit. This sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). When the ECM detects that the signal from the sensor is too low, it triggers the P0117 code. This can cause a variety of issues with the vehicle’s performance and may even result in engine damage if left untreated.
Signs and Symptoms of BMW P0117 Code
The P0117 engine code is related to the engine coolant temperature sensor, which is responsible for monitoring the temperature of the engine coolant. When this sensor fails or malfunctions, it can cause a variety of symptoms that can affect the performance and efficiency of your BMW vehicle. Here are some of the most common signs and symptoms of the BMW P0117 code:
- Check Engine Light: The most obvious symptom of the P0117 code is the illumination of the check engine light on your BMW’s dashboard. This light is triggered by the vehicle’s onboard diagnostic system (OBD-II) when it detects a problem with the engine coolant temperature sensor.
- Poor Fuel Economy: A faulty engine coolant temperature sensor can cause your BMW to consume more fuel than usual. This is because the sensor is responsible for providing the engine control module (ECM) with accurate temperature readings, which are used to adjust the fuel injection timing and air/fuel ratio.
- Engine Overheating: If the engine coolant temperature sensor is not working properly, it may not be able to detect when the engine is overheating. This can cause serious damage to the engine, including warped cylinder heads, blown head gaskets, and cracked engine blocks.
- Hard Starting: A malfunctioning engine coolant temperature sensor can also cause your BMW to have difficulty starting, especially in cold weather. This is because the sensor is responsible for providing the ECM with accurate temperature readings, which are used to adjust the fuel injection timing and air/fuel ratio.
- Poor Performance: If the engine coolant temperature sensor is not working properly, it can cause your BMW to run poorly, with rough idling, hesitation, and stalling. This is because the sensor is responsible for providing the ECM with accurate temperature readings, which are used to adjust the fuel injection timing and air/fuel ratio.
If you are experiencing any of these symptoms, it is important to have your BMW diagnosed by a qualified mechanic as soon as possible. Ignoring the P0117 engine code can lead to serious engine damage and costly repairs.Possible Causes of BMW P0117 Code – Engine Coolant Temperature Sensor 1 Circuit Low
The P0117 engine code is a common issue that BMW owners may encounter. This code indicates a problem with the engine coolant temperature sensor, which is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). When the ECM detects that the signal from the engine coolant temperature sensor is too low, it will trigger the P0117 code. Here are some of the possible causes of this code:
1. Faulty engine coolant temperature sensor – The most common cause of the P0117 code is a faulty engine coolant temperature sensor. Over time, the sensor may become worn or damaged, which can cause it to send incorrect signals to the ECM.
2. Wiring issues – Another possible cause of the P0117 code is wiring issues. If there is a problem with the wiring that connects the engine coolant temperature sensor to the ECM, this can cause the signal to be too low.
3. Failed thermostat – A failed thermostat can also cause the P0117 code. If the thermostat is stuck open, the engine coolant may not reach the proper temperature, which can cause the engine coolant temperature sensor to send a low signal to the ECM.
4. Low coolant level – If the engine coolant level is too low, this can cause the engine coolant temperature sensor to send a low signal to the ECM. This can be caused by a leak in the cooling system or a faulty radiator cap.
5. Failed ECM – In rare cases, a failed ECM can cause the P0117 code. If the ECM is not receiving the correct signal from the engine coolant temperature sensor, it may trigger the code.
It is important to note that the P0117 code can also be triggered by other issues, such as a failed engine coolant temperature gauge or a faulty instrument cluster. However, these are less common causes of the code. If you are experiencing the symptoms of the P0117 code, such as poor engine performance or reduced fuel efficiency, it is important to have your BMW diagnosed by a qualified mechanic. They can determine the exact cause of the code and recommend the appropriate repairs.
Fixes for BMW P0117 Code – Engine Coolant Temperature Sensor 1 Circuit Low
If you are experiencing the P0117 engine code on your BMW vehicle, it is important to address the issue promptly to avoid further damage to your engine. Here are some potential fixes for the problem:
- Replace the engine coolant temperature sensor: The most common cause of the P0117 code is a faulty engine coolant temperature sensor. If this is the case, replacing the sensor should fix the issue.
- Check the wiring and connections: Sometimes, the problem may be with the wiring or connections to the engine coolant temperature sensor. Check for any damage or corrosion and repair or replace as necessary.
- Check the coolant level and quality: Low coolant levels or poor quality coolant can also cause the P0117 code. Make sure your coolant is at the proper level and is clean and free of debris.
- Check the thermostat: A faulty thermostat can also cause the engine coolant temperature sensor to malfunction. Check the thermostat and replace if necessary.
- Check the engine control module (ECM): In rare cases, the problem may be with the ECM itself. If all other potential causes have been ruled out, it may be necessary to replace the ECM.
It is important to note that diagnosing and fixing the P0117 code can be complex and may require the expertise of a professional mechanic. If you are unsure of how to proceed, it is best to seek the help of a qualified technician to avoid causing further damage to your vehicle.
How Much Will It Take to Fix the BMW P0117 Code?
The cost of fixing the BMW P0117 code will depend on the root cause of the problem. If the issue is simply a faulty engine coolant temperature sensor, the cost of replacement can range from $50 to $200, depending on the make and model of your BMW vehicle. However, if the problem is more complex and requires additional repairs, the cost can increase significantly.
It is important to note that attempting to fix the issue yourself can lead to further damage and potentially higher repair costs. It is recommended to take your BMW vehicle to a certified mechanic or dealership to properly diagnose and fix the issue.
In addition to the cost of parts and labor, there may also be additional fees for diagnostic testing and any necessary software updates. It is best to consult with a professional to get an accurate estimate of the cost to fix the BMW P0117 code.
Possible Causes and Fixes of Code
| Possible Cause | Fix | Cost to Fix |
|---|---|---|
| Failed engine coolant temperature sensor | Replace engine coolant temperature sensor | $50-$150 |
| Wiring issues in the engine coolant temperature sensor circuit | Repair or replace damaged wiring | $100-$300 |
| Failed engine control module (ECM) | Replace engine control module (ECM) | $500-$1000 |
| Low engine coolant level | Refill engine coolant to proper level | $20-$50 |
| Failed thermostat | Replace thermostat | $100-$300 |
Preventing the BMW P0117 Code – Engine Coolant Temperature Sensor 1 Circuit Low
The BMW P0117 code indicates a problem with the engine coolant temperature sensor, which can cause various issues with the vehicle’s performance. To prevent this code from appearing, it is essential to take some preventive measures. Here are some ways to prevent the BMW P0117 code:
- Regular Maintenance: Regular maintenance of your BMW vehicle is crucial to prevent any issues with the engine coolant temperature sensor. Make sure to follow the manufacturer’s recommended maintenance schedule and get your vehicle serviced regularly.
- Check Coolant Level: Low coolant levels can cause the engine coolant temperature sensor to malfunction. Therefore, it is essential to check the coolant level regularly and top it up if necessary.
- Replace Faulty Sensor: If you notice any signs of a faulty engine coolant temperature sensor, such as erratic temperature readings or engine performance issues, it is crucial to replace the sensor immediately. A faulty sensor can cause the BMW P0117 code to appear.
- Check Wiring and Connections: Faulty wiring or loose connections can also cause the BMW P0117 code to appear. Therefore, it is essential to check the wiring and connections of the engine coolant temperature sensor regularly and fix any issues immediately.
- Use High-Quality Coolant: Using high-quality coolant can prevent issues with the engine coolant temperature sensor. Make sure to use the recommended coolant for your BMW vehicle and replace it as per the manufacturer’s recommendations.
In conclusion, preventing the BMW P0117 code – Engine Coolant Temperature Sensor 1 Circuit Low requires regular maintenance, checking coolant levels, replacing faulty sensors, checking wiring and connections, and using high-quality coolant. By following these preventive measures, you can ensure that your BMW vehicle runs smoothly and avoid any issues with the engine coolant temperature sensor.
How Serious is the BMW P0117 Code?
The BMW P0117 code is a serious issue that should not be ignored. This code indicates a problem with the engine coolant temperature sensor, which is responsible for monitoring the temperature of the engine coolant. If this sensor is not functioning properly, it can cause a variety of problems with the engine, including reduced performance, decreased fuel efficiency, and even engine damage.
One of the most serious consequences of the P0117 code is the potential for engine overheating. If the engine coolant temperature sensor is not providing accurate readings, the engine may overheat, which can cause significant damage to the engine and other components. Additionally, the P0117 code can cause the engine to run poorly, which can lead to decreased performance and increased emissions.
If you are experiencing the symptoms of the P0117 code, it is important to have your BMW vehicle inspected by a qualified mechanic as soon as possible. Ignoring this code can lead to more serious problems down the road, so it is best to address the issue as soon as possible.
Can You Still Drive with the BMW P0117 Code?
If your BMW is showing the P0117 code, it is indicating a problem with the engine coolant temperature sensor. While it is possible to still drive with this code, it is not recommended. The engine coolant temperature sensor is an important component of your vehicle’s engine management system, and if it is not functioning properly, it can cause a variety of issues.
Driving with the P0117 code can lead to decreased fuel efficiency, reduced engine performance, and potential engine damage. Additionally, if the engine is overheating, it can cause further damage to the engine and other components of your vehicle.
If you are experiencing the symptoms associated with the P0117 code, such as poor engine performance or overheating, it is important to address the issue as soon as possible. Continuing to drive with this code can lead to more serious and costly problems down the line.
It is recommended to have your BMW inspected by a qualified mechanic to diagnose and fix the issue causing the P0117 code.
Conclusion
If you own a BMW and are experiencing the P0117 engine code, it is important to address the issue promptly to avoid further damage to your vehicle. The code indicates a problem with the engine coolant temperature sensor, which can cause a variety of symptoms such as poor fuel economy, rough idling, and engine overheating. Common causes of the P0117 code include a faulty sensor, damaged wiring, or a malfunctioning thermostat. To fix the issue, you may need to replace the sensor or repair any damaged wiring. It is recommended to consult with a professional mechanic to properly diagnose and fix the problem. By addressing the P0117 code promptly, you can ensure the longevity and reliability of your BMW vehicle.
FAQ
What does the BMW P0117 code mean?
The BMW P0117 code indicates a problem with the engine coolant temperature sensor 1 circuit, specifically that the signal is too low.
What are the symptoms of the BMW P0117 code?
The symptoms of the BMW P0117 code may include poor fuel economy, rough idling, engine stalling, and difficulty starting the engine.
What are the common causes of the BMW P0117 code?
The common causes of the BMW P0117 code include a faulty engine coolant temperature sensor, damaged wiring or connectors, a malfunctioning engine control module, or a low coolant level.
How is the BMW P0117 code diagnosed?
The BMW P0117 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 engine coolant temperature sensor and its wiring and connectors.
Can I still drive my BMW with the P0117 code?
It is not recommended to drive your BMW with the P0117 code, as it can cause damage to the engine and decrease fuel efficiency. It is best to have the issue diagnosed and repaired as soon as possible.
How is the BMW P0117 code fixed?
The BMW P0117 code can be fixed by replacing the faulty engine coolant temperature sensor, repairing any damaged wiring or connectors, or replacing the engine control module if necessary.
Can I fix the BMW P0117 code myself?
While it is possible to fix the BMW P0117 code yourself, it is recommended to have a professional mechanic diagnose and repair the issue to ensure it is done correctly and safely.
Learn about other similar BMW Fault Codes from our BMW OBD 2 Fault Code List.