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

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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid dipstick or fill port.
  2. Remove the dipstick and check the fluid level.
  3. If the fluid is low, add the manufacturer-specified transmission fluid.
  4. If the fluid is dirty or burnt, drain and replace the fluid.
  5. Use a suction pump to remove old fluid from the transmission pan.
  6. Refill with the appropriate transmission fluid as per Tesla specifications.

3. Inspect Wiring and Connectors

• Sub-steps:
  1. Visually inspect all wiring harnesses and connectors leading to the transmission control module.
  2. Look for frayed wires, corrosion, or loose connections.
  3. Repair or replace any damaged wiring or connectors as necessary.

4. Replace the Transmission Control Module (if necessary)

• Sub-steps:
  1. Locate the transmission control module usually found near the transmission assembly.
  2. Disconnect the electrical connectors from the module.
  3. Remove any screws or bolts securing the module and take it out.
  4. Install the new transmission control module, securing it with screws or bolts.
  5. Reconnect the electrical connectors.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative terminal of the battery.
  2. Use the OBD-II scanner to clear the P0700 code.
  3. Perform a test drive to ensure the issue is resolved.