A P0715 code typically means there's a fault in the electrical circuit related to this sensor, rather than necessarily a faulty sensor itself. The problem could be:
* Faulty Input/Turbine Speed Sensor: The sensor itself might be malfunctioning.
* Wiring Problems: A short circuit, broken wire, or corroded connection in the wiring harness leading to the sensor.
* Connector Problems: A loose or damaged connector at either the sensor or the PCM (Powertrain Control Module).
* PCM Issue (less likely): Though less common, a problem with the PCM itself could also trigger this code.
Troubleshooting Steps (generally require a mechanic or advanced DIY skills):
1. Visual Inspection: Check the wiring harness leading to the sensor for any obvious damage (breaks, chafing, corrosion). Inspect the connector itself for security and corrosion.
2. Sensor Check (with multimeter): You'll need a multimeter to check the sensor's resistance and voltage. This requires specific knowledge of the sensor's specifications.
3. Scan Tool: Using a scan tool can provide more detailed information, possibly pinpointing the exact location of the problem within the circuit.
Because diagnosing this problem involves electrical testing, it is often recommended to take the vehicle to a mechanic or transmission specialist, especially given the age of the vehicle. Improper diagnosis and repair can lead to further transmission damage.
