how to fix P0700 code in 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

• Gather necessary tools and parts.
• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, transmission fluid pump.
• Parts Required: Transmission fluid (if needed), TCM connector seals (if damaged).
• Disconnect the vehicle's battery to ensure safety.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid access point.
  2. Use a socket set to remove the fill plug.
  3. Check the fluid level; if low, drain the old fluid using a pump.
  4. Replace with manufacturer-recommended transmission fluid; ensure proper level.
  5. Reinstall the fill plug and torque to specifications (consult manufacturer torque specifications).

3. Check Wiring and Connectors

• Sub-steps:
  1. Inspect the wiring harness connected to the TCM for any signs of wear or damage.
  2. Clean any corrosion from the connectors using an electrical contact cleaner.
  3. Replace damaged connectors or wiring as necessary.

4. Test and Reprogram TCM

• Sub-steps:
  1. Reconnect the battery.
  2. Use an OBD-II scanner to clear the fault codes.
  3. If issues persist, access the TCM through the vehicle's diagnostic interface.
  4. Follow the manufacturer's instructions to reset or reprogram the TCM.