what does it mean when my Tesla Model S Plaid/Refresh (2021-present) gives a P0700 code

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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Locate the transmission fluid dipstick or fill plug.
• Remove the dipstick or fill plug and check fluid level.
• If low, drain the old fluid using a fluid extractor; dispose of it properly.
• Replace with manufacturer-recommended transmission fluid (e.g., Tesla-approved fluid).
• Reinsert the dipstick or fill plug securely.

3. Repair or Replace Wiring/Connectors

• Trace the wiring harness from the TCM to the transmission.
• Repair any damaged wires with electrical tape or replace them as necessary.
• Clean and reseat all connectors to ensure a secure connection.
• Reconnect the battery negative terminal.

4. Reprogram or Replace TCM (if necessary)

• If the TCM is faulty, remove it from its mounting location.
• Install the new TCM and reattach all connectors.
• Follow the manufacturer's procedure to program the new TCM using an appropriate diagnostic tool.

5. Final Checks

• Start the vehicle and check for any error codes using the OBD-II scanner.
• Ensure there are no leaks around the transmission area.
• Test drive the vehicle to confirm proper shifting and operation.