how to resolve P0700 code on my Tesla Model S Plaid/Refresh (2021-present)

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

• Ensure the vehicle is on a level surface and the parking brake is engaged.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Gather tools and parts needed for repairs.

2. Update Software

• Reconnect the vehicle to a Wi-Fi network.
• Navigate to the software update menu in the vehicle's touchscreen interface.
• Download and install any available updates related to the transmission control system.

3. Check and Replace Transmission Fluid

• Locate the transmission fluid fill and drain plugs.
• Remove the drain plug and allow the fluid to completely drain into a catch pan.
• Inspect the fluid for contamination or burnt smell. If necessary, replace with new recommended fluid (Tesla uses a specific transmission fluid).
• Refill the transmission with the appropriate amount of fluid through the fill plug.

4. Inspect and Repair Wiring

• Examine the wiring harness leading to the transmission control module.
• Repair or replace any damaged connectors or wires.
• Ensure all connections are secure and free from corrosion.

5. Reset Transmission Control Module

• After completing repairs, reconnect the negative battery terminal.
• Start the vehicle and allow it to idle for a few minutes.
• Drive the vehicle for several miles to allow the transmission control module to recalibrate.