P0720 – Output Speed Sensor Circuit Malfunction

Welcome to our article on the P0720 code – Output Speed Sensor Circuit Malfunction. If you’ve encountered this diagnostic trouble code (DTC) in your vehicle’s transmission control module, understanding its meaning and implications is crucial. In this article, we will explore the common causes, symptoms, and steps to diagnose and address this code effectively.

The P0720 code is triggered when the powertrain control module (PCM) detects erratic input from the output shaft sensor (OSS). This sensor, also known as the output speed sensor or vehicle speed sensor, is responsible for monitoring the speed of the transmission’s output shaft. A circuit malfunction in this sensor can result in various drivability issues and affect the overall performance of your vehicle.

The common causes of the P0720 code include a faulty output shaft speed sensor, a short in the electrical wirings, and a malfunctioning PCM. It is important to note that this code may also be accompanied by the P0715 or P0500 codes, indicating related issues with other speed sensors. Additionally, depending on your vehicle, this code may be stored by either the ECM or PCM, which control different aspects of the vehicle’s systems.

To diagnose the P0720 code, it is recommended to seek professional assistance for accurate and thorough testing. However, if you prefer to take on the diagnosis yourself, you can refer to online resources and videos. The diagnosis process may involve checking the condition of the output shaft speed sensor, inspecting the wiring harness for any damage or loose connections, and measuring the resistance of the sensor.

Fixing the P0720 code can be challenging, as there is no one-size-fits-all solution. It is recommended to have a professional mechanic perform the repairs. If you have the necessary DIY skills, you can research specific solutions employed by other owners of the same make and model. Repair manuals, such as those provided by Chilton or Haynes, can also guide you through the necessary steps.

Key Takeaways

• The P0720 code indicates a malfunction in the output speed sensor circuit of the transmission.
• Common causes include a faulty output shaft speed sensor, electrical wiring issues, or a malfunctioning PCM.
• Symptoms may include delayed or no gear shifting, malfunctioning speedometer, and cruise control.
• Diagnosing the code may involve checking the output shaft speed sensor, inspecting the wiring harness, and measuring resistance.
• Repairing the code can be complex, and professional assistance is recommended.

Symptoms of the P0720 Code

The P0720 code can manifest in various symptoms that indicate a malfunction in the output speed sensor circuit. It is important to identify and understand these symptoms in order to effectively diagnose and address the issue.

Common symptoms associated with the P0720 code include:

• Delayed or No Gear Shifting: The vehicle may experience delays in shifting gears or may not shift gears at all. This can lead to poor acceleration and decreased drivability.
• Malfunctioning Speedometer: The speedometer may provide inaccurate readings or may not function at all. This can make it difficult to gauge the vehicle’s speed while driving.
• Malfunctioning Cruise Control: The cruise control system may not engage or may disengage unexpectedly while driving. This can result in inconvenience and reduced driving comfort.

It is important to note that these symptoms may vary depending on the specific vehicle make and model. Additionally, the P0720 code may also be accompanied by other diagnostic trouble codes such as P0715 or P0500, which can provide further insights into the underlying issue.

It is important to address these symptoms promptly as they can impact the overall performance and safety of the vehicle. In the following sections, we will explore the possible causes of the P0720 code and the necessary troubleshooting steps to effectively resolve this transmission issue.

Possible Causes of the P0720 Code

The P0720 code can be triggered by various factors, including:

1. A malfunctioning output shaft speed sensor: The output shaft speed sensor measures the rotational speed of the transmission output shaft. If this sensor fails to provide accurate data to the PCM (powertrain control module), it can lead to the activation of the P0720 code.
2. An open or short in the electrical wiring or connections: Problems with the electrical wiring or connections associated with the output speed sensor circuit can disrupt the flow of information between the sensor and the PCM. This can result in the P0720 code being stored.
3. A faulty PCM: The PCM is responsible for controlling various functions in the vehicle, including the transmission. If the PCM malfunctions, it may not receive accurate input from the output shaft speed sensor, causing the P0720 code to be triggered.

Identifying the specific cause of the P0720 code is crucial for a successful diagnosis and repair process. Thoroughly inspecting these components and factors can help pinpoint the source of the issue.

Diagnosing the P0720 Code

Diagnosing the P0720 code can be a complex process due to the various possible causes. It is recommended to seek professional assistance for accurate diagnosis. However, if you prefer to diagnose it yourself, you can refer to videos and resources online.

The diagnostic steps may involve:

1. Checking the condition of the output shaft speed sensor
2. Inspecting the wiring harness for any signs of damage or loose connections
3. Measuring the resistance of the sensor
4. Monitoring the OSS sensor signal using an advanced scan tool

By following these steps, you can gather valuable information that will help identify the underlying issue and determine the necessary repairs.

Remember, diagnosing the P0720 code requires attention to detail and a thorough understanding of the vehicle’s transmission system. If you are unsure or unable to perform these diagnostic steps, it is best to consult with a professional technician who has the expertise and specialized tools to accurately diagnose and resolve the issue.

Fixing the P0720 Code

Fixing the P0720 code can be challenging as there is no one-size-fits-all solution. It is recommended to have a professional mechanic perform the fix. However, if you have the required DIY skills and knowledge, you can research and find information online about the repairs employed by other owners of the same vehicle. Forums and similar platforms can provide valuable insights and resolutions specific to your vehicle make and model. Repair manuals, such as those by Chilton or Haynes, can also guide you through the proper steps for repairing your vehicle.

Professional Assistance for P0720 Code

When faced with the P0720 code and professional assistance is not available or preferred, there is an alternative solution that offers convenience and effectiveness. This solution involves the permanent removal of the specific Pcode by uploading the Engine Control Unit (ECU) file to a secure online portal. By taking advantage of this option, you can address the code and resolve the output speed sensor circuit malfunction without the need for extensive technical knowledge or physical repairs.

The process of ECU file upload for permanent removal of the P0720 code is straightforward and user-friendly. It eliminates the need for complex troubleshooting procedures and potential costs associated with professional diagnostics and repairs. With just a few simple steps, you can permanently remove the code and eliminate the underlying issue affecting the output speed sensor circuit of your vehicle.

ECU file upload is a reliable and widely recognized alternative solution embraced by many vehicle owners. By permanently removing the P0720 code, you can enjoy improved drivability and peace of mind, knowing that the output speed sensor circuit malfunction has been effectively resolved. This alternative approach offers a viable and convenient option for addressing the P0720 code without relying solely on professional assistance.

Benefits of ECU File Upload:

• Convenient and user-friendly process
• Eliminates the need for complex troubleshooting
• Avoids potential costs associated with professional assistance
• Offers a permanent solution for the P0720 code
• Improves drivability and reliability of the vehicle

By choosing the alternative solution of ECU file upload for permanent removal of the P0720 code, you can take control of resolving the output speed sensor circuit malfunction. It provides a practical and effective approach that saves time, money, and resources, ensuring your vehicle performs optimally without the presence of the P0720 code.

Take advantage of the alternative solution of ECU file upload for permanent removal of the P0720 code, and experience the convenience and effectiveness it offers in resolving the output speed sensor circuit malfunction. With this approach, you can confidently address the code without solely relying on professional assistance and enjoy the benefits of a properly functioning transmission system.

Conclusion

In conclusion, the P0720 code, also known as the “Output Speed Sensor Circuit Malfunction,” signifies a problem in the output speed sensor circuit of a vehicle’s transmission system. Understanding the symptoms and possible causes of this code, as well as the troubleshooting steps involved in its diagnosis, is essential for effective repairs and restoring the proper functioning of the transmission.

When faced with the P0720 code, it is recommended to seek professional assistance from a qualified mechanic or technician who has the expertise and experience to accurately diagnose and repair the issue. Additionally, utilizing alternative solutions, such as uploading the Engine Control Unit (ECU) file, can provide a convenient and effective resolution.

By addressing the P0720 code promptly and following the appropriate repair procedures, vehicle owners can ensure the smooth operation of their transmission system and reduce the risk of further damage or complications. Remember, it is always important to prioritize the safety and reliability of your vehicle by promptly addressing any diagnostic trouble codes and seeking professional help if needed.