How to Fix P0716: Input/Turbine Speed Sensor Circuit Malfunction

The P0716 error code indicates a malfunction in the input/turbine speed sensor circuit of a vehicle. This sensor plays a crucial role in the operation of the transmission system by providing information about the rotational speed of the input shaft.

When this circuit fails to function properly, it can lead to various transmission issues. In this article, we will guide you through the process of fixing the P0716 error code step by step, ensuring that you can address this problem effectively and get your vehicle back on the road.

Introduction to the P0716 Error Code

The P0716 error code is a generic OBD-II code that specifically points to a problem with the input/turbine speed sensor circuit. It is commonly found in vehicles with automatic transmissions.

When this error code appears, it indicates that the vehicle’s onboard computer has detected an issue with the input/turbine speed sensor or the circuit connected to it.

Understanding the Turbine Speed Sensor

The turbine speed sensor, also known as the input speed sensor, is responsible for measuring the rotational speed of the transmission’s input shaft.

This information is crucial for the transmission control module (TCM) to determine the appropriate shift points and ensure optimal performance. The sensor consists of a reluctor ring and a magnetic coil, which generate a signal that is interpreted by the TCM.

Symptoms of P0716 Error Code

When the P0716 error code is present, you may experience several symptoms indicating a problem with the input/turbine speed sensor circuit. These symptoms can include:

  1. Illuminated Check Engine Light: The most obvious indicator of a problem is the illumination of the Check Engine Light on the dashboard.
  2. Transmission Shifting Issues: You may notice erratic or harsh shifting, hesitation during acceleration, or the transmission getting stuck in a specific gear.
  3. Speedometer and Tachometer Inaccuracies: The speedometer and tachometer readings may fluctuate or become inaccurate due to the faulty sensor.
  4. Decreased Fuel Efficiency: A malfunctioning sensor can affect the transmission’s efficiency, resulting in decreased fuel mileage.
  5. Transmission Slipping: Slippage or failure to engage gears properly can occur, leading to a loss of power and reduced vehicle performance.

Causes of P0716 Error Code

Several factors can contribute to the occurrence of the P0716 error code. The most common causes include:

  1. Faulty Input/Turbine Speed Sensor: Over time, the sensor can wear out or become damaged, leading to inaccurate readings or a complete failure.
  2. Wiring or Connector Issues: Damaged or loose wiring connections between the sensor and the TCM can disrupt the signal transmission.
  3. Sensor Circuit Malfunction: Problems within the sensor circuit, such as corrosion or short circuits, can trigger the P0716 error code.
  4. Faulty TCM: In rare cases, a malfunctioning transmission control module can generate false error codes, including P0716.

Diagnostic Process for P0716 Error Code

Before proceeding with the actual repair, it is essential to perform a thorough diagnostic process to confirm the P0716 error code and identify the underlying issue. Here’s a step-by-step guide to diagnose the problem:

  1. Step 1: Retrieve Error Codes: Use an OBD-II scanner to retrieve the error codes stored in the vehicle’s onboard computer. The P0716 code should be present, indicating the input/turbine speed sensor circuit malfunction.
  2. Step 2: Visual Inspection: Inspect the wiring harness and connectors connected to the input/turbine speed sensor. Look for signs of damage, corrosion, or loose connections.
  3. Step 3: Check Sensor Resistance: Using a multimeter, measure the resistance of the input/turbine speed sensor. Refer to the vehicle’s repair manual for the specified resistance values.
  4. Step 4: Test Voltage Supply: With the key in the ON position, test the voltage supply at the sensor connector using a multimeter. Ensure that the voltage matches the specifications outlined in the repair manual.
  5. Step 5: Perform Continuity Test: Test the continuity between the sensor connector and the TCM connector. If there is no continuity, there may be a wiring issue between the two components.
  6. Step 6: Inspect TCM: If all the previous tests indicate no issues, it may be necessary to inspect the TCM itself. Consult the vehicle’s repair manual for instructions on how to access and test the TCM.

Step-by-Step Guide to Fixing P0716 Error Code

Once you have completed the diagnostic process and confirmed that the input/turbine speed sensor circuit is indeed the culprit, you can proceed with the repair. Follow these step-by-step instructions to fix the P0716 error code:

Step 1: Prepare the necessary tools and safety precautions

Before you begin, gather the required tools for the job. You may need a set of wrenches, sockets, pliers, and a multimeter. It’s also crucial to take necessary safety precautions, such as wearing safety glasses and disconnecting the battery to avoid electrical accidents.

Step 2: Locate the Turbine Speed Sensor

Refer to the vehicle’s repair manual to determine the exact location of the input/turbine speed sensor. In most cases, it is located on or near the transmission housing. Locate the sensor and ensure clear access to it.

Step 3: Disconnect the electrical connector

Carefully disconnect the electrical connector attached to the input/turbine speed sensor. Depending on the vehicle, you may need to remove any retaining clips or screws before disconnecting the connector.

Step 4: Remove the sensor

Using the appropriate tools, remove the input/turbine speed sensor from its mounting location. Take note of the sensor’s orientation and any seals or gaskets present. If necessary, refer to the repair manual for specific instructions on sensor removal.

Step 5: Inspect the sensor and wiring

Examine the sensor for any signs of damage, such as corrosion or physical wear. Inspect the wiring connected to the sensor for frayed or broken wires. Replace the sensor if any issues are found, and repair or replace damaged wiring as necessary.

Step 6: Replace the faulty sensor or repair the wiring

If the sensor is deemed faulty, obtain a replacement sensor that matches the specifications of your vehicle. Install the new sensor into the mounting location, ensuring proper alignment. If the sensor is functioning correctly, focus on repairing or replacing any damaged wiring that was identified during the inspection.

Step 7: Reinstall the sensor and reconnect the electrical connector

Carefully reinstall the input/turbine speed sensor into its mounting location. Ensure a secure fit and proper alignment. Reconnect the electrical connector, ensuring a snug and secure connection.

Step 8: Clear the error codes and test the vehicle

Reconnect the battery and use an OBD-II scanner to clear the error codes from the vehicle’s onboard computer. Start the engine and test the vehicle to ensure that the P0716 error code no longer appears. Take the vehicle for a test drive to verify that the transmission is functioning correctly and that the symptoms associated with the error code have been resolved.

Tips to Prevent P0716 Error Code

To minimize the chances of encountering the P0716 error code in the future, consider the following preventive measures:

  1. Regular Maintenance: Follow the manufacturer’s recommended maintenance schedule for your vehicle, including regular transmission fluid changes and inspections.
  2. Wiring Protection: Ensure that the wiring harnesses connected to the input/turbine speed sensor are properly secured and protected from damage caused by environmental factors or road debris.
  3. Safe Driving Practices: Avoid aggressive driving and sudden shifts between gears, as this can put additional stress on the transmission system.
  4. Prompt Repairs: If you notice any transmission-related issues, address them promptly to prevent further damage and potential error codes from occurring.

Conclusion

Fixing the P0716 error code related to the input/turbine speed sensor circuit malfunction requires a systematic approach. By following the step-by-step guide outlined in this article, you can effectively diagnose and resolve the issue, ensuring the proper functioning of your vehicle’s transmission system. Remember to exercise caution, refer to the vehicle’s repair manual for specific instructions, and consult a professional if needed. By addressing the P0716 error code promptly and implementing preventive measures, you can maintain the longevity and reliability of your vehicle’s transmission.

FAQs

Q1: Can I continue driving my vehicle with the P0716 error code?

It is not recommended to continue driving your vehicle with the P0716 error code. This error code signifies a problem with the input/turbine speed sensor circuit, which can lead to transmission issues and potentially cause further damage. It is best to address the problem promptly to avoid more significant problems down the line.

Q2: Can I fix the P0716 error code myself, or should I seek professional help?

If you have the necessary tools, knowledge, and experience working with automotive systems, you can attempt to fix the P0716 error code yourself. However, if you are uncertain or uncomfortable with the repair process, it is advisable to seek professional help from a qualified mechanic or technician.

Q3: Are there any temporary solutions to bypass the P0716 error code?

While it may be possible to temporarily clear the P0716 error code by clearing the vehicle’s error codes, this does not fix the underlying issue. It is crucial to diagnose and resolve the problem correctly to ensure the proper functioning of your vehicle’s transmission system. Temporary solutions may lead to further damage or safety risks and are not recommended.