The P0718: Input/Turbine Speed Sensor A Circuit Intermittent refers to an issue where the input/turbine speed sensor A is sending an intermittent signal. This can cause improper transmission control, as the transmission relies on a consistent signal from the sensor to regulate shifting. The issue may be caused by a faulty sensor, wiring problems, or poor connections.
P0718 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0718: Input/Turbine Speed Sensor A Circuit Intermittent |
| Is it serious? | Yes, as intermittent signals can lead to transmission shifting problems or erratic transmission behavior. |
| Possible causes | – Intermittent signal from input/turbine speed sensor A – Faulty sensor – Wiring issues |
| How to diagnose? | – Test the sensor for intermittent faults – Inspect wiring and connectors – Replace sensor if necessary |
P0718 Meaning
The P0718 code is triggered when the input/turbine speed sensor A sends an intermittent signal to the transmission control module (TCM). This sensor measures the rotational speed of the transmission’s turbine, which is essential for smooth shifting. An intermittent signal can cause inconsistent transmission performance, leading to poor shifting and possible drivability issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional transmission-related codes that could provide further context about the problem with the input/turbine speed sensor. | OBD-II Scanner |
| Test the Sensor for Intermittent Faults | Use a diagnostic tool to monitor the signal from the input/turbine speed sensor A while the vehicle is running. Check for fluctuating or inconsistent readings. | Diagnostic Tool, Multimeter |
| Inspect Wiring and Connectors | Visually inspect the wiring and connectors related to the input/turbine speed sensor for any signs of damage, corrosion, or loose connections that could cause the intermittent signal. | Flashlight, Multimeter |
| Check Sensor Alignment | Ensure the sensor is properly aligned and securely mounted, as misalignment could result in an intermittent signal. | Basic Tools |
| Replace the Sensor if Necessary | If the sensor is found to be faulty or is producing an inconsistent signal, replace it with a new sensor to ensure proper operation. | Replacement Parts, Standard Tools |
| Clear Code and Retest | After repairs, clear the P0718 code using an OBD-II scanner and take the vehicle for a test drive to verify that the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0718 code has not returned. | OBD-II Scanner |
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