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

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

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the vehicle from any external power source and allow it to power down completely.

2. Inspect and Replace Transmission Fluid

• Tools Required: Fluid pump, 8mm socket set, funnel, clean rags.
• Sub-steps:
  1. Remove the transmission fluid fill plug using an 8mm socket.
  2. Check fluid level; if low, add the recommended transmission fluid (consult Tesla specifications for fluid type).
  3. If the fluid appears dirty or burnt, drain the old fluid via the drain plug, and replace it with new fluid.
  4. Reinstall the fill and drain plugs, ensuring they are torqued to factory specifications.

3. Inspect Wiring and Connectors

• Tools Required: Multimeter, wire brush, dielectric grease.
• Sub-steps:
  1. Locate the wiring harness connected to the TCM.
  2. Visually inspect for any frayed wires or loose connections.
  3. Use a multimeter to check for continuity in the wiring.
  4. Clean any corroded connectors with a wire brush, then apply dielectric grease before reconnecting.

4. Software Update

• Tools Required: Tesla mobile app or in-car system.
• Sub-steps:
  1. Connect to Wi-Fi and access the software update section via the Tesla interface.
  2. Download and install any available updates, following on-screen instructions.
  3. Restart the vehicle to finalize updates.

5. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Use the OBD-II scanner to clear the P0700 code.
  2. Conduct a test drive to confirm proper transmission operation and that the code does not reappear.