how to fix P0700 code in Tesla Model S Original (2012-2020)

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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is in a safe working environment and parked on a level surface.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid fill and drain plugs.
  2. Using a socket set, remove the drain plug and allow the old fluid to drain completely into a suitable container.
  3. Inspect the old fluid for metal shavings or burnt odor, which indicates deeper issues.
  4. Reinstall the drain plug and tighten to the manufacturer’s specified torque (consult the service manual for the exact value).
  5. Refill the transmission with the recommended fluid type through the fill plug using a funnel or pump until the fluid reaches the proper level.

3. Inspect Transmission Control Module (TCM)

• Sub-steps:
  1. Locate the TCM in the vehicle (usually near the transmission).
  2. Disconnect the wiring harness from the TCM.
  3. Inspect the connectors for corrosion or damage; clean or replace if necessary.
  4. Reconnect the TCM and ensure the connection is secure.

4. Reprogram or Update Software

• Sub-steps:
  1. Connect a laptop or diagnostic tool to the Tesla’s diagnostic port.
  2. Follow the manufacturer's instructions to check for any available software updates for the TCM.
  3. If an update is available, follow the prompts to install the latest software version.

5. Reconnect Battery and Test Drive

• Sub-steps:
  1. Reconnect the negative terminal of the battery.
  2. Start the vehicle and allow it to reach operating temperature.
  3. Take the vehicle for a test drive to ensure the transmission operates smoothly and the P0700 code does not reappear.