how to troubleshoot P0720 code on Tesla Model S Original (2012-2020)

Learn how to troubleshoot and fix P0720 code in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, safety glasses.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Replace Output Speed Sensor

1. Locate the Output Speed Sensor:

   • Follow the transmission housing to find the output speed sensor, typically mounted on the side.

2. Remove the Sensor:

   • Use a socket set to remove the mounting bolts securing the sensor.
   • Gently twist and pull the sensor out of the transmission, taking care not to damage surrounding components.

3. Install New Sensor:

   • Apply a small amount of transmission fluid to the O-ring of the new sensor to facilitate installation.
   • Insert the new sensor into place and secure it with the mounting bolts. Torque to manufacturer specifications (typically around 10-12 Nm).

3. Reconnect Wiring and Components

1. Reconnect the Electrical Connector:

   • Ensure the connector is clean and free of corrosion before reconnecting it to the new sensor.
   • Push firmly until it clicks into place.

2. Recheck Fluid Levels:

   • Check and top up transmission fluid if necessary, using the specified type of fluid for the Tesla Model S.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0720 code from the vehicle's computer.