P0718 Input Turbine Speed Sensor Circuit Intermittent

Definition: The P0718 code indicates that the Powertrain Control Module (PCM) has detected an intermittent signal from the input/turbine speed sensor circuit. This sensor is responsible for monitoring the rotational speed of the transmission’s input shaft, which helps in determining shift timing and torque converter lock-up.

P0718 – Input Turbine Speed Sensor Circuit Intermittent

Severity: Moderate

Common Causes

p0718 – Input Turbine Speed Sensor Circuit Intermittent

Common causes:

• Faulty input turbine speed sensor
• Loose or corroded wiring connections to the sensor
• Issues with the transmission control module (TCM)
• Electrical interference or poor grounding

 

Common Misdiagnosis

OBD2 Code: P0718

Description: Input Turbine Speed Sensor Circuit Intermittent

Common Misdiagnosis: Faulty transmission control module (TCM) or a problem with the vehicle’s wiring harness instead of an actual issue with the input turbine speed sensor itself.

 

Common Diagnostic Steps

OBD2 Code: P0718

Description: Input Turbine Speed Sensor Circuit Intermittent

• Check for any stored trouble codes and freeze frame data using an OBD2 scanner.
• Inspect the wiring and connectors related to the input turbine speed sensor for damage or corrosion.
• Test the input turbine speed sensor itself for proper operation using a multimeter.
• Examine the transmission fluid level and condition; ensure it is at the correct level and not contaminated.
• Verify that there are no mechanical issues within the transmission that could affect sensor readings.
• If necessary, replace the input turbine speed sensor with a new one and clear any stored codes.
• Perform a road test to ensure that the issue has been resolved and no new codes appear.