my Tesla Model S Original (2012-2020) has an error code P0700, what does it mean

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

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, transmission fluid.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the vehicle to cool down to prevent burns.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Lift the vehicle securely on jack stands.
  2. Locate the transmission fluid dipstick or fill plug.
  3. Remove the dipstick or fill plug and inspect the fluid condition (should be red and clear).
  4. If the fluid is dark or has a burnt smell, drain the old fluid using a fluid pump.
  5. Replace with manufacturer-recommended transmission fluid, filling to the correct level.
  6. Reinstall the dipstick or fill plug, ensuring it is sealed properly.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Locate the wiring harness connected to the TCM.
  2. Visually inspect for frayed wires, corrosion, or loose connections.
  3. Repair any damaged wires using electrical tape or heat shrink tubing.
  4. Ensure all connectors are securely fastened.

4. Replace or Reprogram TCM (if necessary)

• Sub-steps:
  1. If diagnostics indicate a faulty TCM, unbolt it from its mount.
  2. Disconnect the electrical connectors carefully.
  3. Install the new TCM by reversing the removal steps.
  4. Reconnect the battery and use the OBD-II scanner to reprogram the TCM if required.