how to diagnose the P0700 code on 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

• Tools Required: OBD-II scanner, multimeter, transmission fluid measurement tool.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the vehicle from the mains power source if applicable.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid reservoir.
  2. Use the transmission fluid measurement tool to check the fluid level.
  3. If the fluid is low or contaminated, drain the old fluid into a suitable container.
  4. Replace with the manufacturer-recommended transmission fluid type (check Tesla specifications).
  5. Re-check the fluid level after replacement.

3. Inspect and Repair Wiring and Connectors

• Sub-steps:
  1. Disconnect the battery to prevent short circuits.
  2. Remove the cover of the transmission control module (if accessible).
  3. Inspect all wiring and connectors for signs of wear, corrosion, or damage.
  4. Repair or replace any faulty wiring or connectors as necessary.
  5. Reconnect the battery.

4. Update Software

• Sub-steps:
  1. Connect the vehicle to Wi-Fi and access the software update menu.
  2. Follow the prompts to check for and install any available updates.
  3. Verify that the update process is complete before disconnecting the vehicle from power.

5. Clear Codes and Road Test

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0700 code and any related codes.
  2. Start the vehicle and conduct a road test to ensure normal operation.
  3. Monitor for any reoccurrence of the P0700 code or other transmission issues.