DTC P0718 signifies an intermittent problem within the Input/Turbine Speed Sensor Circuit. This fault arises when the Powertrain Control Module (PCM) identifies sporadic or irregular signal issues from the sensor.

1. What does P0718 code mean?

DTC P0718 indicates an intermittent signal disruption from the Input/Turbine Speed Sensor Circuit to the PCM.

2. What are the causes of DTC P0718?

Possible causes leading to DTC P0718 may include:

• Faulty Sensor: A malfunctioning or failing Input/Turbine Speed Sensor.
• Wiring Issues: Damaged, loose, corroded, or shorted wiring or connectors associated with the sensor circuit.
• Intermittent Connectivity: Loose connections or poor contact in the sensor circuit intermittently disrupting signal transmission.
• Sensor Misalignment: Incorrect sensor alignment or mounting causing intermittent signal interruptions.

3. What are the symptoms of DTC P0718?

Symptoms related to DTC P0718 may include:

• Check Engine Light: Illumination of the Check Engine Light due to intermittent signal disruptions.
• Transmission Problems: Irregular shifting patterns, harsh shifting, or failure to shift gears correctly intermittently.
• Inconsistent Speedometer: Occasional incorrect or fluctuating speedometer readings.
• Reduced Performance: Momentary decreases in engine performance due to sporadic transmission-related issues.

4. How to diagnose DTC P0718?

Diagnosing DTC P0718 involves several steps:

• OBD-II Scan: Utilize an OBD-II scanner to retrieve the trouble code and any related codes stored in the PCM.
• Visual Inspection: Inspect the sensor, wiring, and connectors for visible damage, corrosion, loose connections, or poor contacts.
• Circuit Testing: Test the sensor’s voltage, resistance, and signal integrity during various operating conditions to identify intermittent faults.
• Functional Checks: Conduct functional tests to observe the sensor’s operation intermittently during vehicle operation.

5. How to fix DTC P0718 problem?

Addressing DTC P0718 involves the following steps:

• Repair or Replace Components: Repair damaged wiring, connectors, or replace a malfunctioning Input/Turbine Speed Sensor.
• Secure Connections: Ensure all connections are secure and free from corrosion.
• Clear Codes: After resolving the issue, use an OBD-II scanner to clear the trouble codes and reset the Check Engine Light.
• Professional Assistance: Seek help from a qualified technician for complex wiring issues or further diagnosis and repair.

Conclusion

DTC P0718, indicating intermittent disruptions in the Input/Turbine Speed Sensor Circuit, demands thorough inspection and rectification to ensure consistent transmission functionality and overall vehicle performance. Addressing the root cause promptly is essential for resolving intermittent signal issues.