how to fix P0700 transmission trouble code in Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0700 transmission control malfunction in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the vehicle battery to prevent electrical shorts.

2. Fluid Check and Replacement

• Tools Required: Transmission fluid pump, socket set, torque wrench.
• Instructions:
  1. Remove the transmission fluid drain plug and allow the fluid to fully drain into a suitable container.
  2. Inspect the old fluid for metal shavings or burning smell; if contaminated, replacement is necessary.
  3. Replace the drain plug and torque it to manufacturer specifications (typically around 25 Nm).
  4. Using the fluid pump, fill the transmission with the specified type of Tesla transmission fluid until it reaches the proper level as indicated by the dipstick (if applicable).

3. Wiring and Connector Repair

• Tools Required: Multimeter, wire crimpers, soldering iron.
• Instructions:
  1. Inspect all wiring and connectors leading to the transmission control module for damage or corrosion.
  2. Use a multimeter to test for continuity in the wires; repair or replace any damaged sections.
  3. Ensure all connections are secure and clean any corrosion from connectors.

4. TCM Reset and Calibration

• Tools Required: OBD-II scanner.
• Instructions:
  1. Reconnect the battery and turn the vehicle to the "On" position without starting.
  2. Use the OBD-II scanner to clear the P0700 and any related codes.
  3. Perform a TCM reset and follow any calibration procedures as outlined in Tesla’s service manual.