how to fix P0793 code in Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0793 code related to the Transmission Fluid Temperature Sensor in Tesla Model S Plaid. Step-by-step guide included.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle from the power supply and ensure it is in "Park" mode.
• Allow the vehicle to cool down if recently driven.

2. Remove Transmission Fluid Temperature Sensor

• Tools Required: Socket set, torque wrench, screwdriver set
• Sub-steps:
  1. Locate the Transmission Fluid Temperature Sensor on the transmission assembly.
  2. Remove any protective covers or shields obstructing access to the sensor.
  3. Disconnect the electrical connector from the sensor by pressing the tab and pulling it off.
  4. Unscrew the sensor using the appropriate socket size and carefully remove it from the transmission.

3. Install New Transmission Fluid Temperature Sensor

• Tools Required: Torque wrench
• Sub-steps:
  1. Apply a small amount of thread sealant to the threads of the new sensor (if recommended).
  2. Screw the new sensor into the transmission and tighten it to the manufacturer's torque specification (typically around 15-20 Nm).
  3. Reconnect the electrical connector to ensure a secure fit.
  4. Reinstall any protective covers or shields removed earlier.

4. Refill Transmission Fluid (if necessary)

• Check the transmission fluid level and add fluid if it is low, using the appropriate Tesla-approved transmission fluid.

5. Clear Codes and Test

• Tools Required: OBD-II scanner
• Sub-steps:
  1. Use the OBD-II scanner to clear the P0793 code from the vehicle’s computer.
  2. Perform a test drive to ensure proper operation and shifting of the transmission.