Are you experiencing trouble with your vehicle and receiving the P0718 error code related to the Turbine Speed Sensor Circuit No Signal?
Don’t worry; in this guide, we will provide you with a step-by-step solution to fix this issue. Understanding the cause, symptoms, and diagnostic process will help you get your car back on the road in no time.
The P0718 error code is commonly associated with the Turbine Speed Sensor Circuit No Signal. This error code indicates a problem with the transmission system, specifically the turbine speed sensor.
When the sensor fails to provide a signal to the Transmission Control Module (TCM), the P0718 error code is triggered. It is crucial to address this issue promptly to ensure proper functioning of the transmission system.
Understanding the P0718 Error Code
The P0718 error code points to a fault in the turbine speed sensor circuit, indicating that the TCM is not receiving a signal from the sensor.
The turbine speed sensor is responsible for measuring the rotational speed of the input shaft of the transmission. This information is essential for the TCM to determine the appropriate gear shifting and overall transmission performance.
Symptoms of P0718 Error
When the P0718 error code appears, you may experience several symptoms, including:
- Check Engine Light (CEL): The check engine light will illuminate on your dashboard, indicating a fault in the transmission system.
- Transmission Issues: You may notice erratic shifting, hesitation, or slipping of gears while driving.
- Loss of Power: The vehicle may lose power, affecting its acceleration and overall performance.
- Poor Fuel Efficiency: Due to improper gear shifting, the fuel efficiency of your vehicle may decrease.
Causes of P0718 Error
The P0718 error code can be caused by various factors, including:
- Faulty Turbine Speed Sensor: A malfunctioning or damaged turbine speed sensor can result in the P0718 error code.
- Wiring or Connection Issues: Loose or damaged wiring, connectors, or terminals related to the turbine speed sensor circuit can cause a signal disruption.
- Transmission Control Module (TCM) Malfunction: If the TCM fails to receive a signal from the turbine speed sensor, it may trigger the P0718 error code.
- Low Transmission Fluid Level: In some cases, low transmission fluid levels can lead to the P0718 error code.
To resolve the P0718 error code, follow the step-by-step diagnostic process outlined below:
Step 1: Checking the Transmission Fluid
Start by checking the transmission fluid level. Insufficient fluid can cause transmission issues and trigger the P0718 error code. Consult your vehicle’s manual for the correct procedure to check the fluid level and add more if necessary.
Step 2: Inspecting the Turbine Speed Sensor
Locate the turbine speed sensor, usually positioned on the transmission housing. Inspect the sensor for any visible damage, such as broken wires or corrosion. If you notice any issues, replace the sensor with a new one.
Step 3: Testing the Turbine Speed Sensor
Using a multimeter, test the turbine speed sensor for continuity and proper resistance values. Refer to your vehicle’s service manual for the specific resistance values to ensure accurate readings. If the sensor fails the test, replace it with a new one.
Step 4: Checking the Wiring and Connections
Inspect the wiring and connections related to the turbine speed sensor circuit. Look for loose connections, damaged wires, or corroded terminals. Repair or replace any faulty wiring or connectors as needed.
Step 5: Verifying the Power Supply
Check the power supply to the turbine speed sensor circuit. Ensure that the necessary voltage is reaching the sensor. If there is no power supply, trace the wiring to identify any issues and rectify them.
Step 6: Inspecting the Transmission Control Module (TCM)
Examine the Transmission Control Module (TCM) for any signs of damage or malfunction. If there are no visible issues, consider seeking professional assistance to further diagnose and repair the TCM.
Step 7: Clearing the Error Code
After completing the necessary repairs, use an OBD-II scanner or take your vehicle to a professional mechanic to clear the error code from the TCM. This step ensures that the issue has been resolved and allows you to monitor if the error reoccurs.
Step 8: Test Drive and Final Checks
Take your vehicle for a test drive to ensure that the P0718 error code no longer appears and that the transmission is functioning properly. Perform a final check of the sensor, wiring, and connections to ensure everything is secure and in good condition.
To prevent the occurrence of the P0718 error code, consider the following preventive measures:
- Regular Maintenance: Follow the recommended maintenance schedule for your vehicle, including transmission fluid changes and inspections.
- Proper Fluid Levels: Ensure the transmission fluid is at the correct level. Periodically check the fluid and top it up as needed.
- Careful Driving: Avoid aggressive driving habits that can put excessive stress on the transmission system.
Dealing with the P0718 error code related to the Turbine Speed Sensor Circuit No Signal can be frustrating, but with the right knowledge and guidance, you can resolve the issue. By following the step-by-step diagnostic process and taking preventive measures, you can keep your transmission system in good condition. However, if you are uncertain or uncomfortable performing these tasks yourself, it is advisable to seek professional help from a qualified mechanic.
- Can the P0718 error code be cleared without fixing the underlying issue?
No, clearing the error code without addressing the root cause will only temporarily remove the warning. It is essential to diagnose and fix the issue causing the error code to ensure proper functioning of the transmission system.
- Can I drive my vehicle with the P0718 error code?
It is not recommended to drive your vehicle with the P0718 error code, as it indicates a fault in the transmission system. Continuing to drive may lead to further damage and potentially expensive repairs.
- How much does it cost to replace the turbine speed sensor?
The cost of replacing the turbine speed sensor can vary depending on the make and model of your vehicle, as well as the labor rates in your area. It is best to consult a mechanic or service center to get an accurate estimate for your specific vehicle.